diff --git a/src/common/util/slack/slack-template.ts b/src/common/util/slack/slack-template.ts
index e39d4cf..3acfd6f 100644
--- a/src/common/util/slack/slack-template.ts
+++ b/src/common/util/slack/slack-template.ts
@@ -15,10 +15,6 @@ type Viewer = {
   viewerText: string;
 };
 type MessageOptions = {
-  /**
-   * 서버 이름
-   */
-  appType: string;
   /**
    * 메시지 헤더
    */
@@ -26,7 +22,7 @@ type MessageOptions = {
   /**
    * 메시지 타입
    */
-  type: 'Alert' | 'Error';
+  type: 'Alert' | 'Error' | 'Report';
   /**
    * 메세지 발행 주체 ex)className
    */
@@ -45,6 +41,11 @@ type ErrorMessageOptions = MessageOptions & {
   error: Error;
   request?: Request;
 };
+type ReportAlertMessageOptions = MessageOptions & {
+  type: 'Report';
+  feed: { id: number; content: string; reportCount: number };
+  reason: string;
+};
 
 export class SlackTemplate {
   public static alertTemplate(
@@ -88,8 +89,44 @@ export class SlackTemplate {
     };
   }
 
+  public static reportAlertTemplate(
+    options: ReportAlertMessageOptions,
+  ): IncomingWebhookSendArguments {
+    const { viewer, feed, reason } = options;
+    const defaultAttachment = this.makeDefaultAttachment(options);
+    const viewerAttachment = this.makeViewerAttachment({
+      ...viewer,
+      viewerUrl: `${viewer.viewerUrl}/${feed.id}`,
+    });
+    return {
+      attachments: [
+        defaultAttachment,
+        {
+          color: 'good',
+          fields: [
+            {
+              title: `*피드 정보*:`,
+              value:
+                '```' +
+                `- 피드 id: ${feed.id}\n- 피드 내용: ${feed.content}\n- 누적 신고 횟수: ${feed.reportCount}` +
+                '```',
+              short: false,
+            },
+            {
+              title: `*신고 내용*:`,
+              value: '```' + reason + '```',
+              short: false,
+            },
+          ],
+        },
+        ,
+        viewerAttachment,
+      ],
+    };
+  }
+
   private static makeDefaultAttachment(
-    options: AlertMessageOptions | ErrorMessageOptions,
+    options: MessageOptions,
   ): MessageAttachment {
     return {
       blocks: [
diff --git a/src/config/app/environment/local.ts b/src/config/app/environment/local.ts
index b15e907..95443fb 100644
--- a/src/config/app/environment/local.ts
+++ b/src/config/app/environment/local.ts
@@ -78,5 +78,11 @@ export const LocalConfig: AppConfig = {
       description: process.env.SLACK_DESCRIPTION_BY_SERVER_ERROR_ALERT,
       viewerUrl: process.env.SLACK_VIEWER_URL_BY_SERVER_ERROR_ALERT,
     },
+    feedReportAlert: {
+      webHooklUrl: process.env.SLACK_WEB_HOOK_URI_BY_FEED_REPORT_ALERT,
+      channelName: process.env.SLACK_CHANNEL_NAME_BY_FEED_REPORT_ALERT,
+      description: process.env.SLACK_DESCRIPTION_BY_FEED_REPORT_ALERT,
+      viewerUrl: process.env.SLACK_VIEWER_URL_BY_FEED_REPORT_ALERT,
+    },
   },
 };
diff --git a/src/config/app/environment/production.ts b/src/config/app/environment/production.ts
index f4cbf56..aca3e8c 100644
--- a/src/config/app/environment/production.ts
+++ b/src/config/app/environment/production.ts
@@ -78,5 +78,11 @@ export const ProdConfig: AppConfig = {
       description: process.env.SLACK_DESCRIPTION_BY_SERVER_ERROR_ALERT,
       viewerUrl: process.env.SLACK_VIEWER_URL_BY_SERVER_ERROR_ALERT,
     },
+    feedReportAlert: {
+      webHooklUrl: process.env.SLACK_WEB_HOOK_URI_BY_FEED_REPORT_ALERT,
+      channelName: process.env.SLACK_CHANNEL_NAME_BY_FEED_REPORT_ALERT,
+      description: process.env.SLACK_DESCRIPTION_BY_FEED_REPORT_ALERT,
+      viewerUrl: process.env.SLACK_VIEWER_URL_BY_FEED_REPORT_ALERT,
+    },
   },
 };
diff --git a/src/config/monitor/slack.config.ts b/src/config/monitor/slack.config.ts
index 58a3ece..47accf2 100644
--- a/src/config/monitor/slack.config.ts
+++ b/src/config/monitor/slack.config.ts
@@ -21,4 +21,7 @@ export class SlackAlertOptions {
 export class SlackConfig {
   @InstanceValidator(SlackAlertOptions)
   readonly serverErrorAlert: SlackAlertOptions;
+
+  @InstanceValidator(SlackAlertOptions)
+  readonly feedReportAlert: SlackAlertOptions;
 }
diff --git a/src/custom/nest/interceptor/slack-sender.interceptor.ts b/src/custom/nest/interceptor/slack-sender.interceptor.ts
index 30f7854..d742c07 100644
--- a/src/custom/nest/interceptor/slack-sender.interceptor.ts
+++ b/src/custom/nest/interceptor/slack-sender.interceptor.ts
@@ -41,7 +41,6 @@ export class SlackSenderInterceptor implements NestInterceptor {
     const message = SlackTemplate.errorTemplate({
       error,
       request,
-      appType: this.config.get('appType'),
       header: `${appName}-API-Server 버그 발생`,
       type: 'Error',
       trigger: 'SlackInterceptor',
diff --git a/src/domain/feed/domain/feed.domain.ts b/src/domain/feed/domain/feed.domain.ts
index a020143..7d7bad2 100644
--- a/src/domain/feed/domain/feed.domain.ts
+++ b/src/domain/feed/domain/feed.domain.ts
@@ -143,6 +143,10 @@ export class Feed extends BaseDomain<FeedProps> {
     return this.props.activationAt >= new Date();
   }
 
+  get isLockFeed(): boolean {
+    return this.props.reportCount >= 5;
+  }
+
   /* ========== method ========== */
   addViewCount(): this {
     this.props.viewCount++;
diff --git a/src/domain/feed/feed.repository.ts b/src/domain/feed/feed.repository.ts
index 71cdb0d..bdc9b6c 100644
--- a/src/domain/feed/feed.repository.ts
+++ b/src/domain/feed/feed.repository.ts
@@ -251,6 +251,7 @@ export class FeedRepositoryImpl
     qb.select();
     qb.innerJoin('comment.user', 'user') //
       .addSelect(['user.id', 'user.nickname', 'user.mbtiType']);
+    qb.where('comment.feedId = :feedId', { feedId });
     if (!Util.isNil(nextCursor)) {
       sort === 'ASC' && qb.andWhere('comment.id >= :id', { id: nextCursor });
       sort !== 'ASC' && qb.andWhere('comment.id <= :id', { id: nextCursor });
diff --git a/src/domain/feed/feed.service.ts b/src/domain/feed/feed.service.ts
index 5546316..2e37d09 100644
--- a/src/domain/feed/feed.service.ts
+++ b/src/domain/feed/feed.service.ts
@@ -5,7 +5,7 @@ import {
   NotFoundException,
 } from '@nestjs/common';
 
-import { Util, errorMessage } from '@app/common';
+import { SlackTemplate, Util, errorMessage } from '@app/common';
 import { InjectDataSource } from '@nestjs/typeorm';
 import { DataSource } from 'typeorm';
 import { UserRepository, UserRepositoryToken } from '../user/user.repository';
@@ -25,6 +25,10 @@ import {
 import { FeedRepository, FeedRepositoryToken } from './feed.repository';
 import { RecommendType } from '@app/entity';
 import { UploadService, UploadServiceToken } from './upload/upload.service';
+import { ConfigService } from '@nestjs/config';
+import { SlackAlertOptions, SlackConfig } from '@app/config';
+import { IncomingWebhook } from '@slack/client';
+import { Feed } from './domain';
 
 export const FeedServiceToken = Symbol('FeedServiceToken');
 export interface FeedService {
@@ -72,12 +76,19 @@ export interface FeedService {
 
 @Injectable()
 export class FeedServiceImpl implements FeedService {
+  private readonly reportAlartConfig: SlackAlertOptions;
+  private readonly webhook: IncomingWebhook;
+
   constructor(
     @InjectDataSource() private readonly dataSource: DataSource,
     @Inject(FeedRepositoryToken) private readonly feedRepo: FeedRepository,
     @Inject(UserRepositoryToken) private readonly userRepo: UserRepository,
     @Inject(UploadServiceToken) private readonly uploadService: UploadService,
-  ) {}
+    config: ConfigService,
+  ) {
+    this.reportAlartConfig = config.get<SlackConfig>('slack').feedReportAlert;
+    this.webhook = new IncomingWebhook(this.reportAlartConfig.webHooklUrl);
+  }
 
   async getFeeds(getDto: GetFeedsRequestDTO): Promise<GetFeedsResponseDTO[]> {
     const feeds =
@@ -247,10 +258,13 @@ export class FeedServiceImpl implements FeedService {
       if (isExist) throw new ConflictException(errorMessage.E409_FEED_003);
 
       await txFeedRepo.createReportHistory(userId, feedId, postDto);
+      // TODO: report 로직 향후 변경 예정
       await txFeedRepo.updateProperty(feedId, {
         reportCount: feed.addReportCount().reportCount,
+        activationAt: feed.isLockFeed ? new Date() : feed.activationAt,
       });
-      // TODO: 신고 횟수가 5회 이상이면 슬랙에 알림을 보내는 로직을 추가한다.
+
+      feed.isLockFeed && (await this.feedReportAlert(feed, postDto.reason));
       await queryRunner.commitTransaction();
     } catch (error) {
       await queryRunner.rollbackTransaction();
@@ -306,4 +320,20 @@ export class FeedServiceImpl implements FeedService {
       await queryRunner.release();
     }
   }
+
+  private async feedReportAlert(feed: Feed, reason: string) {
+    const { viewerUrl } = this.reportAlartConfig;
+    const message = SlackTemplate.reportAlertTemplate({
+      header: '피드 신고 알림',
+      type: 'Report',
+      trigger: 'FeedService',
+      viewer: {
+        viewerUrl,
+        viewerText: '피드 신고 내역 확인',
+      },
+      feed,
+      reason,
+    });
+    await this.webhook.send(message);
+  }
 }
diff --git a/src/entity/feed/report-history.entity.ts b/src/entity/feed/report-history.entity.ts
index 11af9cb..3f78cce 100644
--- a/src/entity/feed/report-history.entity.ts
+++ b/src/entity/feed/report-history.entity.ts
@@ -15,11 +15,11 @@ export class ReportHistoryEntity extends BaseEntity {
   @ApiProperty({
     description: '신고 사유',
     type: String,
-    minLength: 10,
+    minLength: 5,
     maxLength: 200,
   })
   @Expose()
-  @StringValidator({ minLength: 10, maxLength: 200 })
+  @StringValidator({ minLength: 5, maxLength: 200 })
   @Column('varchar', { comment: '신고 사유', length: 200 })
   reason: string;