Multi-stage adjusting damping valve, as well as shock absorber and suspension system using damping valve

A multi-stage adjusting damping valve, comprising:

• a throttle valve, an overflow valve, and a multi-stage pilot valve;
• the multi-stage pilot valve at least comprises a mechanical regulating valve and a plurality of high-speed switch electromagnetic valves which are provided in parallel;
• wherein the multi-stage pilot valve receives oil which flows in after sequentially flowing through the throttle valve and the overflow valve, a calibration value of output force of the multi-stage pilot valve adjusted in a manner that at least part of the oil flows through the mechanical regulating valve to compensate for assembly errors;
• the multi-stage pilot valve also forms a plurality of damping regulation stages in a manner of adjustably providing the plurality of high-speed switch electromagnetic valves which are connected in parallel and have different throttle hole diameters, such that the multi-stage pilot valve is able to provide multi-stage damping force under displacement excitation.