Municipal construction pit digging device

The utility model discloses a municipal construction pit digging device which comprises an installation plate, two symmetrical supporting plates are fixedly installed on the lower surface of the installation plate, a bottom plate and an operation plate are fixedly installed on the surfaces of the supporting plates respectively, the surface of the operation plate is in threaded connection with an operation bolt, and the lower end of the operation bolt is rotationally connected with a plate body. Rollers are fixedly mounted on the lower surface of the plate body, and a mounting frame is embedded in the upper surface of the mounting plate. According to the pit digging device for municipal construction, a motor and a protective cover are arranged, an electric telescopic rod runs to drive a mounting box and a punching drill to descend, the punching drill is driven to rotate through the mounting rod under the action of the motor, and the ground is punched through rotation of the punching drill, so that the device c