Small multi-function drilling machine

The invention relates to the technical field of drilling machines, in particular to a small multi-function drilling machine. The small multi-function drilling machine comprises a base, a mast and a power device are arranged on the base, a pedestal is arranged at the bottom of the power device, and a power head is arranged at the bottom of the pedestal. A clamping device is arranged at the bottom of the power head and comprises a clamping head, a plurality of first grooves are formed in the clamping head, and a second annular groove is formed in the outside of the clamping head. Inserting rods are arranged between the second annular groove and the first grooves in a communicating mode, clamping blocks matched with the first grooves are arranged in the first grooves, and the inserting rods are arranged on the backs of the clamping blocks and penetrate through inserting holes. Lantern rings are arranged at the ends of the inserting rods in a wedge-shaped matched mode, the contacting faces of the inserting rods a