The invention discloses a heat dissipation electrical cabinet, which comprises an electrical cabinet body (1), a support frame (3) is provided at the bottom of the electrical cabinet body (1), and an air outlet (2) is provided at the bottom of the electrical cabinet body (1). , There is an air inlet (4) on the top of the electrical cabinet body (1), the air inlet (4) is connected to the motor (5) through a pipe, and a dust-proof net (6) is installed under the air inlet (4). (1) A temperature measuring machine (7) is set on the top. The beneficial effects of the invention are: when the electrical components are working, the heat dissipation of the electrical cabinet can be controlled by means of the temperature-expandable support frame in the electrical cabinet, and the support frame can be raised when the temperature is high. The cooperation of the air inlet and the air outlet in the electrical cabinet can fully flow the fluid in the electrical cabinet, communicate with the outside air, reduce the temperature, and prevent accidents. Filter out, prevent in advance, and protect electrical components. The setting of the temperature measuring machine is to lock the temperature more accurately to control whether the motor is working, which greatly saves costs and achieves high efficiency and stability.