Drilling device for tunnel construction

The utility model relates to the technical field of mechanical equipment, in particular to a drilling device for tunnel construction, which can effectively reduce labor intensity, improve working efficiency and reduce use limitation. Comprising a workbench, an adjusting motor, an adjusting lead screw, a sliding table, a sliding rail, a driving motor, a fixing sleeve, a drill rod, a water pump and a hydraulic cylinder, four sets of supporting legs are arranged at the bottom end of the workbench, the adjusting motor is fixedly installed at the front end of the workbench, a sliding groove is formed in the top end of the workbench, and the adjusting lead screw is rotationally installed in the sliding groove by being connected with the output end of the adjusting motor; the water pump is fixedly installed at the top end of the fixing frame, a spray head is arranged at the right end of the fixing frame and communicates with the output end of the water pump through a water pipe, a fixing plate is arranged on the lef