diff --git a/src/CAD/IFox.CAD.Shared/Runtime/Env.cs b/src/CAD/IFox.CAD.Shared/Runtime/Env.cs
index 645734f7236e6a69673fa3ebdc9e9a28a410aabb..37007fd8c6cde1c9cff040fc2b22b0d1913b20ff 100644
--- a/src/CAD/IFox.CAD.Shared/Runtime/Env.cs
+++ b/src/CAD/IFox.CAD.Shared/Runtime/Env.cs
@@ -111,6 +111,17 @@ public static Point3d LastPoint
         set => Acaop.SetSystemVariable("LASTPOINT", value);
     }
 
+    /// <summary>
+    /// 获取文档创建时间
+    /// </summary>
+    /// <returns></returns>
+    public static DateTime CreateTime => GetDateTimeFromJulian((double)Acaop.GetSystemVariable("tdcreate"));
+
+    /// <summary>
+    /// 文档上次保存的时间
+    /// </summary>
+    public static DateTime UpdateTime => GetDateTimeFromJulian((double)Acaop.GetSystemVariable("tdupdate"));
+
     #region Dimblk
 
     /// <summary>
@@ -583,16 +594,17 @@ public static void AppendSupportPath(params string[] folders)
                 .Select(item =>
                     item[^1] == '\\' ? item.Remove(item.Length - 1) : item)
                 .ToHashSet();
-        foreach (var folder in folders) {
+        foreach (var folder in folders)
+        {
             if (!Directory.Exists(folder)) continue;
-            var folderLower = 
+            var folderLower =
                 folder[^1] == '\\' ? folder.Remove(folder.Length - 1).ToLower() : folder.ToLower();
             if (!acadPathLowerArr.Contains(folderLower))
                 acadPath = folder + ";" + acadPath;   //加到前面方便检查
         }
         SetEnv("ACAD", acadPath);
     }
-    
+
     /// <summary>
     /// 删除支持搜索文件目录
     /// </summary>
@@ -601,10 +613,11 @@ public static void RemoveSupportPath(params string[] folders)
     {
         if (!folders.Any()) return;
         var acadPathArr = GetEnv("ACAD").Split(';').ToList();
-        foreach (var folder in folders) {
-            var folderLower = 
+        foreach (var folder in folders)
+        {
+            var folderLower =
                 folder[^1] == '\\' ? folder.Remove(folder.Length - 1).ToLower() : folder.ToLower();
-            acadPathArr.RemoveAll(item => 
+            acadPathArr.RemoveAll(item =>
                 (item[^1] == '\\' ? item.Remove(item.Length - 1).ToLower() : item.ToLower()) == folderLower);
         }
         SetEnv("ACAD", string.Join(";", acadPathArr));
@@ -623,12 +636,13 @@ public static void AppendTrustedPath(params string[] folders)
                 .ToLower()
                 .Split(';')
                 .Where(item => item != "")
-                .Select(item => 
+                .Select(item =>
                     item[^1] == '\\' ? item.Remove(item.Length - 1) : item)
                 .ToHashSet();
-        foreach (var folder in folders) {
+        foreach (var folder in folders)
+        {
             if (!Directory.Exists(folder)) continue;
-            var folderLower = 
+            var folderLower =
                 folder[^1] == '\\' ? folder.Remove(folder.Length - 1).ToLower() : folder.ToLower();
             if (!trustedPathLowerArr.Contains(folderLower))
                 trustedPath = folder + ";" + trustedPath; //加到前面方便检查
@@ -643,10 +657,11 @@ public static void RemoveTrustedPath(params string[] folders)
     {
         if (!folders.Any()) return;
         var trustedPathArr = GetVar("TRUSTEDPATHS").ToString().Split(';').ToList();
-        foreach (var folder in folders) {
-            var folderLower = 
+        foreach (var folder in folders)
+        {
+            var folderLower =
                 folder[^1] == '\\' ? folder.Remove(folder.Length - 1).ToLower() : folder.ToLower();
-            trustedPathArr.RemoveAll(item => 
+            trustedPathArr.RemoveAll(item =>
                 (item[^1] == '\\' ? item.Remove(item.Length - 1).ToLower() : item.ToLower()) == folderLower);
         }
         SetVar("TRUSTEDPATHS", string.Join(";", trustedPathArr));
@@ -780,7 +795,7 @@ public static string GetAcapVersionDll(string str = "acdb")
     /// <exception cref="ArgumentNullException"></exception>
     public static object SetVarEx(string key, string value)
     {
-        
+
         var currentVar = GetVar(key);
 
         object valueType = currentVar.GetType().Name switch
@@ -842,4 +857,44 @@ public static void DelayUpdateLayLockFade()
         IdleAction.Add(() => Acaop.SetSystemVariable(lfName, lf));
     }
     #endregion
+
+
+    /// <summary>
+    /// 儒略日转换
+    /// 儒略日计算，来源：https://www.zhihu.com/question/21698547
+    /// </summary>
+    /// <param name="JulianDate">儒略日</param>
+    /// <returns></returns>
+    private static DateTime GetDateTimeFromJulian(double JulianDate)
+    {
+        var num = Math.Floor(JulianDate);
+        var num2 = Math.Floor((num - 1867216.25) / 36524.25);
+        var num3 = Math.Floor(num2 / 4.0);
+        var num4 = num + 1.0 + num2 - num3;
+        var num5 = num4 + 1524.0;
+        var num6 = Math.Floor((num5 - 122.1) / 365.25);
+        var num7 = Math.Floor(365.25 * num6);
+        var num8 = Math.Floor((num5 - num7) / 30.6001);
+        var num9 = Math.Floor(30.6001 * num8);
+        var day = Convert.ToInt32(num5 - num7 - num9);
+        var num10 = Convert.ToInt32((num8 < 14.0) ? (num8 - 2.0) : (num8 - 14.0));
+        var month = checked(num10 + 1);
+        var num11 = Convert.ToInt32((num10 > 1) ? (num6 - 4716.0) : (num6 - 4715.0));
+        var year = (num11 == 0) ? checked(num11 - 1) : num11;
+        var num12 = JulianDate - num;
+        var num13 = Math.Floor(num12 * 24.0);
+        var num14 = num12 - num13 / 24.0;
+        var num15 = Math.Floor(num14 * 1440.0);
+        var value = Math.Floor((num14 - num15 / 1440.0) * 86400.0);
+        var result = new DateTime(
+            year,
+            month,
+            day,
+            Convert.ToInt32(num13),
+            Convert.ToInt32(num15),
+            Convert.ToInt32(value)
+        );
+        return result;
+    }
+
 }
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