diff --git a/src/components/Form/src/hooks/useFormValues.ts b/src/components/Form/src/hooks/useFormValues.ts
index ca4cf3a..7e54fa3 100644
--- a/src/components/Form/src/hooks/useFormValues.ts
+++ b/src/components/Form/src/hooks/useFormValues.ts
@@ -107,14 +107,24 @@ export function useFormValues({ defaultValueRef, getSchema, formModel, getProps
 
       const [startTimeFormat, endTimeFormat] = Array.isArray(format) ? format : [format, format]
 
-      values[startTimeKey] = dateUtil(startTime).format(startTimeFormat)
-      values[endTimeKey] = dateUtil(endTime).format(endTimeFormat)
+      values[startTimeKey] = formatTime(startTime, startTimeFormat)
+      values[endTimeKey] = formatTime(endTime, endTimeFormat)
       Reflect.deleteProperty(values, field)
     }
 
     return values
   }
 
+  function formatTime(time: string, format: string) {
+    if (format === 'timestamp')
+      return dateUtil(time).unix()
+
+    else if (format === 'timestampStartDay')
+      return dateUtil(time).startOf('day').unix()
+
+    return dateUtil(time).format(format)
+  }
+
   function initDefault() {
     const schemas = unref(getSchema)
     const obj: Recordable = {}