The invention discloses a high-voltage switch cabinet with transparency capable of being freely adjusted. The cabinet body of the high-voltage switch cabinet is based on an electrochromic device, the transparency of the cabinet body is adjusted based on the electrochromism principle by adjusting the current of the electrochromic device, and working conditions inside the cabinet body can be conveniently checked. The electrochromic device is of a solid complementary structure and is made of tungsten oxide and nickel oxide materials. By means of optimization of the structure and the material preparation technology, the sensitivity and coloring efficiency of the device are improved, and the discoloring and color fading speed is high, so that the light transmissivity of the cabinet body of the high-voltage switch cabinet in the coloring state is greatly reduced, the light adjusting range is enlarged, the continuous and rapid adjustment function of the cabinet body is achieved, and the high-voltage switch cabinet is easy and convenient to use and beneficial to industrial production.