diff --git a/mbtk/include/ql/ql_common.h b/mbtk/include/ql/ql_common.h
new file mode 100755
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--- /dev/null
+++ b/mbtk/include/ql/ql_common.h
@@ -0,0 +1,76 @@
+
+/**  
+  @file
+  ql_common.h
+
+  @brief
+  This file provides the definitions for common functions, and declares the 
+  common functions.
+
+*/
+/*============================================================================
+  Copyright (c) 2017 Quectel Wireless Solution, Co., Ltd.  All Rights Reserved.
+  Quectel Wireless Solution Proprietary and Confidential.
+ =============================================================================*/
+/*===========================================================================
+
+                        EDIT HISTORY FOR MODULE
+
+This section contains comments describing changes made to the module.
+Notice that changes are listed in reverse chronological order.
+
+
+WHEN        WHO            WHAT, WHERE, WHY
+----------  ------------   ----------------------------------------------------
+23/08/2019  Nebula.li      create
+=============================================================================*/
+
+#ifndef __QL_COMMON_H__
+#define __QL_COMMON_H__
+
+#include <sys/types.h>
+#include <unistd.h>
+#include <sys/syscall.h>
+
+#include <libubox/ustream.h>
+#include <libubox/blobmsg_json.h>
+#include <libubox/kvlist.h>
+#include "libubus.h"
+#include "uci_blob.h"
+#include "libubox/uloop.h"
+#include "rilutil.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void Ql_Powerdown(int mode);
+
+int ql_start_main_thread();
+int ql_exit_main_thread();
+int ql_ril_sync_request(unsigned int requestid, const void * data, int len,void* priv,void * cb,int timeout);
+int ql_ril_async_request(unsigned int requestid, const void * data, int len,void* priv,void * cb);
+int ql_ubus_sync_request(char *obj_name, char *method,struct blob_buf *blob_buf,void* priv,void *cb,int timeout);
+int ql_ubus_async_request(char *obj_name, char *method,struct blob_buf *blob_buf,void* priv,void *cb);
+int ql_ubus_subscribe_reg(char *subscriber_name, struct ubus_subscriber *event_obj);
+int ql_ubus_subscribe_remove(char *subscriber_name, struct ubus_subscriber *event_obj);
+
+int atcmd_get_line_num(char * result, int result_len);
+char * atcmd_get_line(char * result, int result_len,int index);
+int atcmd_get_para_num(char * line);
+void atcmd_get_para_value_str(char * line,int index, char *para_value);
+void ql_set_response(struct kvlist *result_list,int reqid, int resp_type, int ret, void *data, int data_len);
+int ql_get_response(struct kvlist *result_list,int reqid, int * resp_type, void *data);
+int kvlist_get_len(struct kvlist *kv, const void *data);
+
+int utf8_to_usc2(unsigned char *utf8_data,int utf8_data_len, unsigned int *usc2_data);
+int usc2_to_utf8(unsigned int *usc2_data, int usc2_data_len, unsigned char *utf8_data);
+
+int set_config_option(const char *package, const char *section, const char *option, const char *value);
+char *get_config_option(char *package, char *section, char *option);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
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