Bearing seat end face boring machine

The invention relates to the technical field of boring machines, and discloses a bearing seat end face boring machine which comprises a machining table, a portal frame, a dust hood, an adsorption plate and a boring mechanism. When an air cylinder drives an electric rotating disc and a cutter to move downwards to conduct boring machining on the end face of a bearing seat on an adsorption plate, a connecting frame conducts external thread transmission on a ball screw, so that a first bevel gear at the bottom end of the ball screw drives a third bevel gear through a fourth bevel gear and a transmission shaft; and when the positioning plate rotates, a positioning rod connected with the top in a penetrating mode can drive the positioning plate to expand and contract along a guide groove and a through groove, and clamping positioning or positioning releasing of the outer portion of the bearing pedestal placed on the adsorption plate is achieved. In this way, when the bearing seat on the adsorption plate is bored, t