diff --git a/apps/chrg/applications/thread/chrg_roll_sou.c b/apps/chrg/applications/thread/chrg_roll_sou.c
index 4c91f93..3612cd7 100644
--- a/apps/chrg/applications/thread/chrg_roll_sou.c
+++ b/apps/chrg/applications/thread/chrg_roll_sou.c
@@ -16,6 +16,7 @@
 #include "chrg_thread.h"
 #include "chrg_roll_sou.h"
 #include "chrg_north.h"
+#include "chrg_sink.h"
 #include "chrg_eload.h"
 #include "chrg_utils.h"
 
@@ -782,6 +783,7 @@ void chrg_roll_sou_thread_entry (void *data)
 	struct chrg_thread_t *pTS = &chrgthr[IDX_THR_SOUTH];
 	struct mb_msg_t *pMB_R = RT_NULL;
 	while (1) {
+		chrg_sink_short_keepalive_process();
 		rt_mutex_take(pTHR->mutex, RT_WAITING_FOREVER);
 		run = pROLL->run;
 		single_ch = pROLL->ch;
diff --git a/apps/chrg/applications/utils/chrg_sink.c b/apps/chrg/applications/utils/chrg_sink.c
index f8ddb60..9ee9355 100644
--- a/apps/chrg/applications/utils/chrg_sink.c
+++ b/apps/chrg/applications/utils/chrg_sink.c
@@ -23,6 +23,7 @@
 #define SINK_UNLOAD_QUERY_INTERVAL_MS 20U  // 卸载期间两次优先量测请求的最小间隔
 #define SINK_UNLOAD_CURRENT_MAX_MA    200U // 判定负载已安全卸载的最大实际电流
 #define SINK_UNLOAD_CONFIRM_COUNT      2U  // 连续满足低电流条件的量测帧数
+#define SINK_SHORT_KEEPALIVE_MS        30U // 短路测试WORK_START保活下发周期
 
 /* 主继电器闭合跟踪：1=已提交ALL_REL_ON（主继电器应已闭合） 0=未闭合/已断开。
  * 用于0V硬保护区分"首次开载/握手恢复"（主继电器未闭合，Now_voltage=0属正常）
@@ -958,6 +959,23 @@ int chrg_sink_volt_judge(eIDX_SOU_CH idx, struct chrg_switch_t *pSW)
 	return chrg_sink_work(idx, pSW);
 }
 
+void chrg_sink_short_keepalive_process(void)
+{
+	eIDX_SOU_CH idx;
+	struct chrg_switch_t *pSW;
+
+	for (idx = IDX_SOU_CH1; idx < TOTAL_SOU_CHS; idx++) {
+		pSW = &chrgnorth.sw[idx];
+		if ((pSW->id != ID_SINK) ||
+			(pSW->sink.work_mode != SINK_WORK_ON_TEST_SHORT) ||
+			(pSW->sink.test.test_mode != SINK_TEST_SHORT)) {
+			g_sink_short_start_tick[idx] = 0U;
+			continue;
+		}
+		(void)chrg_sink_TEST_SHORT_KEEPALIVE(idx);
+	}
+}
+
 /*****************************************************************
 函数名称： chrg_sink_TEST_OCP_ON
 函数描述： 配置并启动负载OCP过流保护测试
@@ -1021,6 +1039,9 @@ int chrg_sink_work(eIDX_SOU_CH idx, struct chrg_switch_t *pSW)
 		(work_mode != SINK_WORK_UNLOAD_WAIT) &&
 		(work_mode != SINK_WORK_LOW_AUX_WAIT) &&
 		(work_mode != SINK_WORK_HANDSHAKE_WAIT)) {
+		if (work_mode == SINK_WORK_ON_TEST_SHORT) {
+			return chrg_sink_TEST_SHORT_KEEPALIVE(idx);
+		}
 		return 0;
 	}
 	switch(work_mode){
diff --git a/apps/chrg/applications/utils/chrg_sink.h b/apps/chrg/applications/utils/chrg_sink.h
index 504ce31..92a185a 100644
--- a/apps/chrg/applications/utils/chrg_sink.h
+++ b/apps/chrg/applications/utils/chrg_sink.h
@@ -418,6 +418,7 @@ extern void chrg_nor_sink_test_run(rt_uint8_t ch, struct chrg_switch_t *pSW);
 extern rt_bool_t chrg_sink_load_should_start(const struct chrg_switch_t *pSW);
 extern int chrg_sink_work(eIDX_SOU_CH idx, struct chrg_switch_t *pSW);
 extern int chrg_sink_volt_judge(eIDX_SOU_CH idx, struct chrg_switch_t *pSW);
+extern void chrg_sink_short_keepalive_process(void);
 #endif