diff --git a/cfg_parse/cfg_parser.cpp b/cfg_parse/cfg_parser.cpp
index 07e25a0..f947daf 100644
--- a/cfg_parse/cfg_parser.cpp
+++ b/cfg_parse/cfg_parser.cpp
@@ -3433,6 +3433,153 @@ static bool is_pqdif_com_type(const char* com_type)
 	return type.compare("PQDIF", Qt::CaseInsensitive) == 0;
 }
 
+static const char* PQDIF_CONFIG_DIR = "/FeProject/etc";
+static const char* PQDIF_CONFIG_FILE = "/FeProject/etc/pqdif-config.xml";
+static const char* PQDIF_CONFIG_TMP_FILE = "/FeProject/etc/pqdif-config.xml.tmp";
+
+static bool pqdif_config_value_valid(const char* value)
+{
+	if (value == NULL)
+		return false;
+
+	QString text = QString::fromLocal8Bit(value).trimmed();
+	return !text.isEmpty() && text.compare("N/A", Qt::CaseInsensitive) != 0;
+}
+
+static int pqdif_config_write_begin(QFile& file, QXmlStreamWriter& writer)
+{
+	if (!QDir().mkpath(PQDIF_CONFIG_DIR)) {
+		printf("[PQDIF][CONFIG] mkdir failed: %s\n", PQDIF_CONFIG_DIR);
+		return APR_EGENERAL;
+	}
+
+	QFile::remove(PQDIF_CONFIG_TMP_FILE);
+	file.setFileName(PQDIF_CONFIG_TMP_FILE);
+	if (!file.open(QIODevice::WriteOnly | QIODevice::Truncate | QIODevice::Text)) {
+		printf("[PQDIF][CONFIG] open tmp failed: %s, err=%s\n",
+		       PQDIF_CONFIG_TMP_FILE,
+		       file.errorString().toLocal8Bit().constData());
+		return APR_EGENERAL;
+	}
+
+	// Always write a complete temporary XML first. Java only reads the
+	// final file after the tmp file has been closed and atomically renamed.
+	writer.setDevice(&file);
+	writer.setAutoFormatting(true);
+	writer.setCodec("UTF-8");
+	writer.writeStartDocument("1.0");
+	writer.writeStartElement("PqdifConfig");
+	return APR_SUCCESS;
+}
+
+static int pqdif_config_write_commit(QFile& file, QXmlStreamWriter& writer)
+{
+	writer.writeEndElement();
+	writer.writeEndDocument();
+	file.flush();
+	file.close();
+
+	if (::rename(PQDIF_CONFIG_TMP_FILE, PQDIF_CONFIG_FILE) != 0) {
+		printf("[PQDIF][CONFIG] rename %s to %s failed\n",
+		       PQDIF_CONFIG_TMP_FILE,
+		       PQDIF_CONFIG_FILE);
+		QFile::remove(PQDIF_CONFIG_TMP_FILE);
+		return APR_EGENERAL;
+	}
+
+	return APR_SUCCESS;
+}
+
+static void pqdif_config_write_abort(QFile& file)
+{
+	if (file.isOpen())
+		file.close();
+	QFile::remove(PQDIF_CONFIG_TMP_FILE);
+}
+
+static void pqdif_config_write_point(QXmlStreamWriter& writer, const LD_info_t* LD_info)
+{
+	writer.writeEmptyElement("Point");
+	writer.writeAttribute("pointNo", QString::number((int)LD_info->cpuno));
+	writer.writeAttribute("monitorId", QString::fromLocal8Bit(LD_info->mp_id).trimmed());
+}
+
+static int pqdif_config_write_device(QXmlStreamWriter& writer,
+                                     ied_t* ied,
+                                     ied_usr_t* ied_usr)
+{
+	writer.writeStartElement("Device");
+	writer.writeAttribute("ip", QString::fromLocal8Bit(ied->channel[0].addr_str).trimmed());
+	writer.writeAttribute("pqdifType", QString::fromLocal8Bit(ied_usr->dev_type).trimmed());
+
+	int point_count = 0;
+	if (ied_usr->LD_info != NULL) {
+		for (int cpuno = 0; cpuno < ied->cpucount; ++cpuno) {
+			LD_info_t* LD_info = &(ied_usr->LD_info[cpuno]);
+			if (LD_info->read_flag != ENABLE)
+				continue;
+			if (LD_info->cpuno == 0 || !pqdif_config_value_valid(LD_info->mp_id))
+				continue;
+
+			pqdif_config_write_point(writer, LD_info);
+			++point_count;
+		}
+	}
+
+	writer.writeEndElement();
+	return point_count;
+}
+
+int pqdif_rebuild_config_from_current_ledger()
+{
+	if (!is_cfg_pqdif_process())
+		return APR_SUCCESS;
+
+	QFile file;
+	QXmlStreamWriter writer;
+	int write_count = 0;
+	int point_count = 0;
+
+	if (pqdif_config_write_begin(file, writer) != APR_SUCCESS)
+		return APR_EGENERAL;
+
+	if (g_node != NULL && g_node->clients != NULL) {
+		for (int i = 0; i < g_node->n_clients; ++i) {
+			ied_t* ied = g_node->clients[i];
+			if (ied == NULL || ied->usr_ext == NULL || ied->chncount <= 0 || ied->channel == NULL)
+				continue;
+
+			ied_usr_t* ied_usr = (ied_usr_t*)ied->usr_ext;
+			if (ied_usr->dev_flag != ENABLE)
+				continue;
+			if (!is_pqdif_com_type(ied_usr->com_type))
+				continue;
+			if (!pqdif_config_value_valid(ied->channel[0].addr_str) ||
+			    !pqdif_config_value_valid(ied_usr->dev_type)) {
+				printf("[PQDIF][CONFIG] skip invalid ledger, terminal=%s ip=%s type=%s\n",
+				       ied_usr->terminal_id,
+				       ied->channel[0].addr_str,
+				       ied_usr->dev_type);
+				continue;
+			}
+
+			point_count += pqdif_config_write_device(writer, ied, ied_usr);
+			++write_count;
+		}
+	}
+
+	if (pqdif_config_write_commit(file, writer) != APR_SUCCESS) {
+		pqdif_config_write_abort(file);
+		return APR_EGENERAL;
+	}
+
+	printf("[PQDIF][CONFIG] rebuild success, file=%s, devices=%d, points=%d\n",
+	       PQDIF_CONFIG_FILE,
+	       write_count,
+	       point_count);
+	return APR_SUCCESS;
+}
+
 static bool terminal_should_bind_to_current_process(const terminal_dev* dev)
 {
 	if (dev == NULL)
@@ -4782,6 +4929,9 @@ int parse_device_cfg_web()
 			
 		cout << "dev init create count:" << count_real;
 
+		if (pqdif_rebuild_config_from_current_ledger() != APR_SUCCESS)
+			return APR_EGENERAL;
+
 		return APR_SUCCESS;
 	}
 	catch (...)
diff --git a/mms/mms_process.c b/mms/mms_process.c
index ee7d0b6..f74a7f5 100644
--- a/mms/mms_process.c
+++ b/mms/mms_process.c
@@ -1446,6 +1446,11 @@ void process_ledger_update(trigger_update_xml_t *ledger_update_xml)
 //////////////////////////////////////////////////////////////////////////////
 	if (ledger_update_xml->modify_update_num || ledger_update_xml->new_update_num || ledger_update_xml->delete_update_num){
 		create_ledger_log(ledger_update_xml);		//写入文件
+		if (g_node_id == PQDIF_DATA_BASE_NODE_ID) {
+			if (pqdif_rebuild_config_from_current_ledger() != APR_SUCCESS) {
+				printf("[PQDIF][CONFIG] rebuild pqdif-config.xml failed after ledger update\n");
+			}
+		}
 	}
 
 }
diff --git a/mms/rdb_client.h b/mms/rdb_client.h
index c0c0ce3..41500a5 100644
--- a/mms/rdb_client.h
+++ b/mms/rdb_client.h
@@ -503,6 +503,7 @@ int stringToInt(const char* str, int* result);
 bool isCharPtrEmpty(const char* str);
 int parse_ledger_update_xml(trigger_update_xml_t* trigger_update_xml);
 int update_one_terminal_ledger(terminal* update, int i,ied_t* ied,int terminal_index,int ied_take);
+int pqdif_rebuild_config_from_current_ledger();
 void print_trigger_update_xml(const trigger_update_xml_t* trigger_update);
 char* parse_model_cfg_web_one(ied_t* ied,char* out_model);
 void Set_xml_nodeinfo_one(char* dev_type);