Auxiliary support and electric hand drill

The utility model discloses an auxiliary support and an electric hand drill. The auxiliary support comprises two rectangular top plates which are symmetrically arranged in parallel, a plurality of connecting beams connected between the two rectangular top plates, a sliding base arranged at the tops of the two rectangular top plates in a sliding mode, and a lantern ring fixed to the sliding base. Asliding rod is arranged on one side of each rectangular top plate, the axis of each sliding rod is parallel to the length direction of the corresponding rectangular top plate, the two sides of the bottom of the sliding base are each provided with a sliding block, and the sliding blocks are arranged on the corresponding sliding rods in a sliding and sleeving mode. And the axial direction of the lantern ring is parallel to the length direction of the rectangular top plate. The electric hand drill comprises the auxiliary support, an electric hand drill body, a drill bit clamp and a drill bit, aconnecting part matched wi