The utility model discloses a coil stripping trolley hydraulic system, belong to steelmaking equipment technical field, this system is including setting up in the lift cylinder of coil stripping trolley bottom, be equipped with first pilot operated directional control valve between lift cylinder and the pressure oil sources, lift cylinder does not have and is equipped with the balanced valve between pole chamber and the first pilot operated directional control valve, the control end and the lift cylinder of balanced valve have the pole chamber to be connected, lift cylinder does not have and has connected gradually third liquid accuse lock and second overflow valve between pole chamber to the pressure oil sources oil return end, the control end of third liquid accuse lock is connected with solenoid electric valve, lift cylinder does not have and is connected with pressure sensor between pole chamber and the third liquid accuse lock. The utility model discloses low and hydraulic system self pressure oscillation causes the crush injury of coiled material inner circle and outer lane and layer and glues wounded problem within a definite time to the sensitivity of lift cylinder pressure variation feedback can to solve pressure sensor that current coil stripping trolley hydraulic system exists.