The utility model relates to a rain -proof performance testing device of tent, store up water separator, flow centralized control ware, simulation rainwater spray set including circulating water pond, frequency conversion water pump, governing valve, annular, circulating water pond leads to pipe and connects the frequency conversion water pump, and the water pipe passes through governing valve back clevis shape and stores up water separator. The utility model discloses a constant current and stability that water separator had realized the water yield are stored up to the annular, and every shower nozzle is equipped with solitary flowmeter, and its working water jet capacity can carry out even independent accurate control, the height -adjustable who sprays, the rain -proof performance test of adaptable different specification tents.