Tarpaulin cover material elevator

A covering material elevator belongs to the technical field of engineering machinery and comprises a rotary chassis, a cab and a big arm are arranged above the rotary chassis, a winch is fixedly mounted on the rotary chassis, a fixed pulley is mounted on one side of the front end of the big arm, and one end of a steel wire rope of the winch bypasses the fixed pulley and is connected with a lifting hook. Due to the fact that the fixed pulley is arranged on one side of the front end of the large arm, a suspender structure does not need to be arranged independently, the position of the fixed pulley can be controlled more conveniently, the positioning accuracy of a lifting hook is improved, excavation work cannot be interfered, dismounting of components is not needed, and use is more convenient. The winch control valve is connected with a distribution valve through a pilot pipe, the distribution valve is connected with a hydraulic oil tank, the distribution valve is connected with the winch through an oil supply