The invention provides a power physical property testing device which comprises a funnel, the funnel is characterized in that the top of the funnel is detachably connected with the material loading barrel, the bottom of the funnel is connected with a first valve, and a material receiving disc is correspondingly arranged under the bottom of the funnel; the material loading barrel, the funnel and the material receiving disc are arranged in a box body, an electric heating element A, a cooling device and a water tank are arranged at the positions, close to the funnel, in the box body, the water tank is internally provided with an electric heating element B, an ultraviolet lamp, an xenon lamp, a gas input opening and a gas output opening, the gas input opening is used for inputting ozone or protective atmosphere, one side of the funnel is provided with a temperature sensor and a humidity sensor, and the electric heating element A, the electric heating element B, the temperature sensor and the humidity sensor are electrically connected with a control system; the upper end of the box body is further provided with a feeding opening corresponding to the material loading barrel. By means of the technical scheme, the power physical property can be tested by simulating different environment states, such as a single environment, or an alternating environment or a combination environment.