Control system of pneumatic stop valve

The invention discloses a control system of a pneumatic stop valve, which relates to the field of valves, and comprises a main valve body, a main cylinder body arranged above the main valve body, an auxiliary cylinder body arranged above the main cylinder body, and an auxiliary valve body connected with the main cylinder body and the auxiliary cylinder body, an auxiliary cylinder cover and an auxiliary piston are arranged in the auxiliary cylinder body, a first channel for communicating the main cylinder cover with the auxiliary valve body is arranged between the main cylinder cover and the auxiliary valve body, the auxiliary piston is provided with an auxiliary valve rod which downwards extends out of the auxiliary cylinder body and is inserted into the auxiliary valve body, and an auxiliary valve clack is arranged at the bottom end of the auxiliary valve rod; and when the auxiliary valve clack is driven by the auxiliary piston to move up and down, the first channel can be blocked and opened. The quick openi