diff --git a/aibox_sophon_adapter/models/alarm_models.py b/aibox_sophon_adapter/models/alarm_models.py
index fe9e422..35413c1 100644
--- a/aibox_sophon_adapter/models/alarm_models.py
+++ b/aibox_sophon_adapter/models/alarm_models.py
@@ -5,7 +5,7 @@
 未声明的额外字段通过 model_config extra=allow 保留。
 """
 from typing import Any, Optional
-from pydantic import BaseModel, Field
+from pydantic import BaseModel, Field, field_validator
 
 
 # ============================================================
@@ -23,6 +23,14 @@ class GpsInfo(BaseModel):
     longitude: float = Field(default=0.0, description="经度")
     angleCourse: float = Field(default=0.0, description="GPS 角度")
 
+    @field_validator('kSpeed', 'nSpeed', 'latitude', 'longitude', 'angleCourse', mode='before')
+    @classmethod
+    def _empty_str_to_zero(cls, v: Any) -> Any:
+        """设备可能上报空字符串，转为 0.0"""
+        if v == '' or v is None:
+            return 0.0
+        return v
+
 
 class MediaInfo(BaseModel):
     """视频通道信息"""
@@ -38,6 +46,14 @@ class MediaInfo(BaseModel):
     RtspTransport: bool = Field(default=False, description="是否开启 RTSP 转发")
     Params: Optional[dict] = Field(default=None, description="预留其他参数")
 
+    @field_validator('MediaWidth', 'MediaHeight', mode='before')
+    @classmethod
+    def _empty_str_to_zero(cls, v: Any) -> Any:
+        """设备可能上报空字符串，转为 0"""
+        if v == '' or v is None:
+            return 0
+        return v
+
 
 class ResultProperty(BaseModel):
     """告警 Result 中的属性项"""
@@ -125,6 +141,14 @@ class AlarmReportRequest(BaseModel):
     DataId: int = Field(default=0, description="数据 ID")
     Id: int = Field(default=0, description="记录 ID")
 
+    @field_validator('DataId', 'Id', 'TimeStamp', 'Type', mode='before')
+    @classmethod
+    def _empty_str_to_zero(cls, v: Any) -> Any:
+        """设备可能上报空字符串，转为 0"""
+        if v == '' or v is None:
+            return 0
+        return v
+
 
 # ============================================================
 # 告警上报响应体