diff --git a/src/main/java/com/ycwl/basic/face/pipeline/helper/PuzzleGenerationOrchestrator.java b/src/main/java/com/ycwl/basic/face/pipeline/helper/PuzzleGenerationOrchestrator.java
index 6682bce1..0d02ee8a 100644
--- a/src/main/java/com/ycwl/basic/face/pipeline/helper/PuzzleGenerationOrchestrator.java
+++ b/src/main/java/com/ycwl/basic/face/pipeline/helper/PuzzleGenerationOrchestrator.java
@@ -2,6 +2,7 @@ package com.ycwl.basic.face.pipeline.helper;
 
 import cn.hutool.core.date.DateUtil;
 import com.ycwl.basic.integration.scenic.dto.scenic.ScenicV2DTO;
+import com.ycwl.basic.mapper.SourceMapper;
 import com.ycwl.basic.puzzle.dto.PuzzleGenerateRequest;
 import com.ycwl.basic.puzzle.dto.PuzzleGenerateResponse;
 import com.ycwl.basic.puzzle.dto.PuzzleTemplateDTO;
@@ -44,6 +45,9 @@ public class PuzzleGenerationOrchestrator {
     @Autowired
     private ScenicRepository scenicRepository;
 
+    @Autowired
+    private SourceMapper sourceMapper;
+
     /**
      * 异步生成景区所有启用的拼图模板
      *
@@ -74,6 +78,11 @@ public class PuzzleGenerationOrchestrator {
                 // 3. 准备公共动态数据
                 Map<String, String> baseDynamicData = buildBaseDynamicData(faceId, faceUrl, scenicBasic);
 
+                // 4. 设置dateStr为图片素材的最大创建时间
+                Date maxCreateTime = sourceMapper.getMaxCreateTimeByFaceId(faceId);
+                baseDynamicData.put("dateStr", DateUtil.format(
+                        maxCreateTime != null ? maxCreateTime : new Date(), "yyyy.MM.dd"));
+
                 // 4. 使用虚拟线程池并行生成所有模板
                 java.util.concurrent.atomic.AtomicInteger successCount = new java.util.concurrent.atomic.AtomicInteger(0);
                 java.util.concurrent.atomic.AtomicInteger failCount = new java.util.concurrent.atomic.AtomicInteger(0);
@@ -121,7 +130,6 @@ public class PuzzleGenerationOrchestrator {
         baseDynamicData.put("faceId", String.valueOf(faceId));
         baseDynamicData.put("scenicName", scenicBasic.getName());
         baseDynamicData.put("scenicText", scenicBasic.getName());
-        baseDynamicData.put("dateStr", DateUtil.format(new Date(), "yyyy.MM.dd"));
 
         return baseDynamicData;
     }
diff --git a/src/main/java/com/ycwl/basic/mapper/SourceMapper.java b/src/main/java/com/ycwl/basic/mapper/SourceMapper.java
index 5411b9d0..2ff2c7b1 100644
--- a/src/main/java/com/ycwl/basic/mapper/SourceMapper.java
+++ b/src/main/java/com/ycwl/basic/mapper/SourceMapper.java
@@ -143,6 +143,13 @@ public interface SourceMapper {
      */
     List<Long> getDeviceIdsByFaceId(Long faceId);
 
+    /**
+     * 获取faceId关联的图片素材的最大创建时间
+     * @param faceId 人脸ID
+     * @return 最大创建时间，无记录时返回null
+     */
+    Date getMaxCreateTimeByFaceId(Long faceId);
+
     /**
      * 根据faceId和设备ID获取source
      * @param faceId 人脸ID
diff --git a/src/main/java/com/ycwl/basic/puzzle/util/PuzzleDuplicationDetector.java b/src/main/java/com/ycwl/basic/puzzle/util/PuzzleDuplicationDetector.java
index 802d555e..2464553f 100644
--- a/src/main/java/com/ycwl/basic/puzzle/util/PuzzleDuplicationDetector.java
+++ b/src/main/java/com/ycwl/basic/puzzle/util/PuzzleDuplicationDetector.java
@@ -25,7 +25,7 @@ import java.util.stream.Collectors;
 @Component
 @RequiredArgsConstructor
 public class PuzzleDuplicationDetector {
-    private final Set<String> skippedElementKeys = Set.of("dateStr");
+    private final Set<String> skippedElementKeys = Set.of();
     private final PuzzleGenerationRecordMapper recordMapper;
 
     /**
diff --git a/src/main/java/com/ycwl/basic/service/pc/orchestrator/FaceMatchingOrchestrator.java b/src/main/java/com/ycwl/basic/service/pc/orchestrator/FaceMatchingOrchestrator.java
index 7c0f12a0..fce5dddf 100644
--- a/src/main/java/com/ycwl/basic/service/pc/orchestrator/FaceMatchingOrchestrator.java
+++ b/src/main/java/com/ycwl/basic/service/pc/orchestrator/FaceMatchingOrchestrator.java
@@ -405,7 +405,9 @@ public class FaceMatchingOrchestrator {
         baseDynamicData.put("faceId", String.valueOf(faceId));
         baseDynamicData.put("scenicName", scenicBasic.getName());
         baseDynamicData.put("scenicText", scenicBasic.getName());
-        baseDynamicData.put("dateStr", DateUtil.format(new Date(), "yyyy.MM.dd"));
+        Date maxCreateTime = sourceMapper.getMaxCreateTimeByFaceId(faceId);
+        baseDynamicData.put("dateStr", DateUtil.format(
+                maxCreateTime != null ? maxCreateTime : new Date(), "yyyy.MM.dd"));
 
         templateList
             .forEach(template -> {
diff --git a/src/main/resources/mapper/SourceMapper.xml b/src/main/resources/mapper/SourceMapper.xml
index 572f9e0f..687c069e 100644
--- a/src/main/resources/mapper/SourceMapper.xml
+++ b/src/main/resources/mapper/SourceMapper.xml
@@ -464,6 +464,15 @@
         ORDER BY s.device_id ASC
     </select>
 
+    <select id="getMaxCreateTimeByFaceId" resultType="java.util.Date">
+        SELECT MAX(s.create_time)
+        FROM member_source ms
+        INNER JOIN source s ON ms.source_id = s.id
+        WHERE ms.face_id = #{faceId}
+          AND s.type = 2
+          AND ms.deleted = 0
+    </select>
+
     <select id="getSourceByFaceAndDeviceId" resultType="com.ycwl.basic.model.pc.source.entity.SourceEntity">
         SELECT s.*
         FROM source s