Mining excavation loaders are also known as skimming machines, tunnel cleaning machines, and tunnel slag discharge machines. According to the walking method, it is divided into wheeled and crawler type. It is equipped with five functions: hydraulic walking, excavating device, belt conveying, loading and cleaning the bottom of the roadway. Mainly composed of electric motor, hydraulic walking, excavating device, walking device, belt conveying and discharging and electrical control system. The whole vehicle hydraulic system is driven by a 15kw motor to drive the gear pump. The hydraulic oil passes through the fuel tank to the multi-way valve to execute the action components and then returns to the fuel tank. The four handles of the multi-way valve complete the control of the hydraulic.