diff --git a/Src/DLT_Utilities.cpp b/Src/DLT_Utilities.cpp
index 79017c9..aded40e 100644
--- a/Src/DLT_Utilities.cpp
+++ b/Src/DLT_Utilities.cpp
@@ -26,6 +26,11 @@ DLT_File::~DLT_File()
 // 清理请求的存储并恢复初始状态
 void DLT_File::clear(void)
 {
+    if (this->p_file != nullptr)
+    {
+        fclose(this->p_file);
+        this->p_file = nullptr;
+    }
 
     if (this->Msg_List_Head == nullptr)
         return;
@@ -288,11 +293,9 @@ DLT_Type::DLT_Err DLT_File::export_to_csv(const char *file_name_str)
     if (p_file == nullptr)
         return DLT_Type::DLT_ERROR_FILE_CREATE_FAILED;
 
-    DLT_Type::DLT_Msg_Node *p_msg = this->Msg_List_Head;
-
     // 打印首行
     {
-        fprintf(p_file, "Index,Date,Time,Timestamp,Count,ECU ID,Application ID,Context ID ,Session ID,Type,Sub Type,Mode,#Args,Payload,");
+        fprintf(p_file, "Index,Date&Time(Local),Timestamp,Count,ECU ID,Application ID,Context ID ,Session ID,Type,Sub Type,Mode,#Args,Payload,");
 
         for (size_t count = 0; count < this->payload_max_len; count++)
             fprintf(p_file, "B%d,", count);
@@ -301,6 +304,7 @@ DLT_Type::DLT_Err DLT_File::export_to_csv(const char *file_name_str)
     }
 
     // 遍历每行数据
+    DLT_Type::DLT_Msg_Node *p_msg = this->Msg_List_Head;
     for (size_t line_count = 0; line_count < this->msg_count; line_count++)
     {
 
@@ -312,13 +316,9 @@ DLT_Type::DLT_Err DLT_File::export_to_csv(const char *file_name_str)
             time_t timestamp = (time_t)p_msg->Msg.storage_header.seconds;
             struct tm *time_struct = localtime(&timestamp);
             char time_str[100] = {'\0'};
-            // 格式化为 "YY/MM/DD 时区"
-            strftime(time_str, sizeof(time_str), "%Y/%m/%d UTC%z", time_struct);
-            fprintf(p_file, "%s,", time_str);
-
-            // 格式化为 "HH:MM:SS"
-            strftime(time_str, sizeof(time_str), "%H:%M:%S", time_struct);
-            fprintf(p_file, "T-%s.%d,", time_str, p_msg->Msg.storage_header.microseconds);
+            // 格式化为 "YY/MM/DD HH:MM:SS"
+            strftime(time_str, sizeof(time_str), "%Y/%m/%d %H:%M:%S", time_struct);
+            fprintf(p_file, "%s.%d,", time_str, p_msg->Msg.storage_header.microseconds);
         }
 
         // 输出头附加信息
@@ -349,25 +349,60 @@ DLT_Type::DLT_Err DLT_File::export_to_csv(const char *file_name_str)
             else
                 fprintf(p_file, "%.4s,", p_msg->Msg.storage_header.ecu);
 
-            // 存在扩展头
+            // 输出 Apid 和 Ctid
             if (p_msg->Msg.standard_header.htyp.UEH)
             {
                 fprintf(p_file, "%.4s,", p_msg->Msg.extendedheader.apid);
                 fprintf(p_file, "%.4s,", p_msg->Msg.extendedheader.ctid);
+            }
+            else
+            {
+                // skip apid && ctid
+                fprintf(p_file, "N/A,N/A,");
+            }
 
-                if (p_msg->Msg.standard_header.htyp.WSID)
-                    fprintf(p_file, "%d,", p_msg->Msg.standard_header_extra.seid);
-                else
-                    fprintf(p_file, "N/A,");
+            // 存在 Session ID
+            if (p_msg->Msg.standard_header.htyp.WSID)
+                fprintf(p_file, "%d,", p_msg->Msg.standard_header_extra.seid);
+            else
+                fprintf(p_file, "N/A,");
+
+            // 输出 Type 、Subtype 、Mode 、#Args
+            if (p_msg->Msg.standard_header.htyp.UEH)
+            {
+                const char *Type_str[] = {"log", "trace", "network", "control"};
+                const char *SubType_Str[][0xF] = {
+                    // LOG
+                    {"fatal", "error", "warn", "info", "debug", "verbose", nullptr},
+                    // Trace
+                    {"variable", "function in", "function out", "state", "vbf", nullptr},
+                    // Network
+                    {"IPC", "CAN", "FlexRay", "Most", "Ethernet", "SOME/IP", "0x7", "0x8", "0x9", "0xA", "0xB", "0xC", "0xD", "0xE", "0xF"},
+                    // Control
+                    {"Request", "response", nullptr},
+                };
+
+                // Type && Subtype
+                fprintf(p_file, "%s,", Type_str[p_msg->Msg.extendedheader.msin.MSTP]);
+                fprintf(p_file, "%s,", SubType_Str[p_msg->Msg.extendedheader.msin.MSTP][(p_msg->Msg.extendedheader.msin.MTIN - 1) % 0xF]);
+
+                // Mode ** #Args
+                fprintf(p_file, "%s,", p_msg->Msg.extendedheader.msin.VERB ? "verbose" : "non-verbose");
+                fprintf(p_file, "%d,", p_msg->Msg.extendedheader.noar);
             }
         }
 
+        // Payload概览行
+        fprintf(p_file, ",");
+
+        // 逐个打印 Payload
         for (size_t count = 0; count < p_msg->Msg.payload_length; count++)
             fprintf(p_file, "%0X,", p_msg->Msg.payload_buffer[count]);
 
-        p_msg = p_msg->p_next;
         fseek(p_file, -1, SEEK_CUR);
         fprintf(p_file, "\r\n");
+
+        p_msg = p_msg->p_next;
     }
 
     return DLT_Type::DLT_ERROR_NONE;