diff --git a/api/services/__pycache__/poster.cpython-312.pyc b/api/services/__pycache__/poster.cpython-312.pyc
index 4171235..8045436 100644
Binary files a/api/services/__pycache__/poster.cpython-312.pyc and b/api/services/__pycache__/poster.cpython-312.pyc differ
diff --git a/api/services/poster.py b/api/services/poster.py
index d924d49..036dc4d 100644
--- a/api/services/poster.py
+++ b/api/services/poster.py
@@ -214,19 +214,33 @@ class PosterService:
 
 
         # # 3. 图片解码
-        try:
-            # 移除可能存在的MIME类型前缀    
-            if images_base64.startswith("data:"):
-                images_base64 = images_base64.split(",", 1)[1]
-            
-            # 解码base64
-            image_bytes = base64.b64decode(images_base64)
-            
-            # 创建PIL Image对象
-            images = Image.open(BytesIO(image_bytes))
+        images = None
+        # 获取模板的默认尺寸，如果获取不到则使用标准尺寸
+        template_size = getattr(template_handler, 'size', (900, 1200))
+        
+        if images_base64 and images_base64.strip():
+            try:
+                # 移除可能存在的MIME类型前缀    
+                if images_base64.startswith("data:"):
+                    images_base64 = images_base64.split(",", 1)[1]
+                
+                # 解码base64
+                image_bytes = base64.b64decode(images_base64)
+                
+                # 创建PIL Image对象
+                images = Image.open(BytesIO(image_bytes))
+                logger.info("图片解码成功")
 
-        except Exception as e:
-            print(f"解码失败: {e}")
+            except Exception as e:
+                logger.error(f"图片解码失败: {e}")
+                # 创建一个与目标大小一致的纯黑底图
+                images = Image.new('RGB', template_size, color='black')
+                logger.info(f"创建默认黑色背景图，尺寸: {template_size}")
+        else:
+            logger.warning("未提供图片数据，使用默认黑色背景图")
+            # 创建一个与目标大小一致的纯黑底图
+            images = Image.new('RGB', template_size, color='black')
+            logger.info(f"创建默认黑色背景图，尺寸: {template_size}")
         
         # 4. 调用模板生成海报
         try: