Height-adjustable rotary drilling rig

The utility model relates to the technical field of rotary drilling rigs. The utility model discloses a height-adjustable rotary drilling rig. The device comprises a fixing plate, a chassis is fixedlyinstalled at the bottom of the fixing plate, rolling mechanisms are fixedly installed on the front face and the back face of the chassis, a rotary drilling rig body is fixedly installed at the top ofthe fixing plate, connecting plates are fixedly installed on the left and right sides of the fixing plate, and sleeves penetrating through and extending to the bottoms of the connecting plates are fixedly installed on the front and rear sides of the tops of the connecting plates. The utility model discloses a height-adjustable rotary drilling rig. The problem that the height of an existing rotarydrilling rig cannot be adjusted during drilling operation is solved. If the height of the machine body cannot be adjusted, the crawler can only touch the ground; if only the caterpillar band touchesthe ground and needs to dril