Multifunctional geological exploration drilling rig

The utility model belongs to the field of geological exploration, and discloses a multifunctional geological exploration drilling rig, which is characterized in that a vertically arranged mounting plate is welded on one side of the top of a base, a horizontally arranged transverse plate is slidably arranged on one side of the mounting plate, a vertically arranged drill rod is rotatably arranged on the transverse plate, and the drill rod is rotatably arranged on the base. A second motor is installed at the bottom of the transverse plate, an output shaft of the second motor is in transmission connection with a drill rod, a drill bit is installed at the bottom end of the drill rod, a cavity is formed in the drill bit, a water inlet pipe and a water outlet pipe which are vertically arranged are installed in the drill rod, and the bottom end of the water inlet pipe and the bottom end of the water outlet pipe extend into the cavity. The cooling device can cool the drill bit, prevents the drill bit from being scrapp