In view of the current situation of double hydraulic cylinder shear crusher in the waste processing industry,including low automation level,low production efficiency and low utilization degree,a concrete scheme of automatic control for a kind of double hydraulic cylinder shear crusher was put forward.By application of the scheme,automatic adjustment control of hazardous waste in knife case can be realized as well as constant power coordinated control of two hydraulic motors.So the broken effect and automation,security level are improved.