Quick grounding switch device

A quick grounding switch device is characterized in that: a motor is connected with a transmission shaft through a ball screw, wherein the transmission shaft drives an inner connecting lever and an outer connecting lever to perform axial rotation; the inner connecting lever drives a slide block to perform straight reciprocation and drives a moving arc contact through a connecting plate; the outer connecting lever is connected with a closing spring; a conductive loop is connected with a tank body through a static arc contact, a moving arc contact, a conductive rod, and a conductive board in an insulator; a heavy-load connector as a power supply and control signal interface is arranged outside the tank body; a heater is vertically arranged on the tank body; a ventilation device which promotes air flow in a mechanism cover is arranged outside and above the tank body; and the part between the transmission shaft and the tank body is sealed through double sealing rings. Compared with the prior design, the quick gro