Military standard rain test chamber used for military equipment or electronic products in a variety of intensity rain environment simulation of dynamic operation, military equipment rain test method and the main parameters, in a test box can be realized in the wind source of rain test, drip test. Determine the military equipment or electronic products in the rain conditions, the ability of its shell seals to prevent rainwater infiltration and by the rain or after the work of the performance, to assess the waterproof quality of the product.