The invention provides a high-precision bearing ring wall edge burr removing device which comprises an inner supporting mechanism, multiple sets of optical sensors and multiple sets of laser cutting heads. The inner supporting mechanism abuts against the inner wall of a bearing ring from the interior of the bearing ring through a supporting rod, the multiple sets of optical sensors and the multiple sets of laser cutting heads are installed above and laterally below the bearing ring, the optical sensors and the laser cutting heads which are installed above the bearing ring are perpendicularly opposite to the outer wall of the bearing ring downwards, the optical sensors and the laser cutting heads which are installed laterally below the bearing ring are horizontally opposite to the bottom edge of the bearing ring, and movement and rotation of the inner supporting mechanism are controlled through a machine tool mechanical jaw. By the adoption of the optical sensor and laser cutting way, burrs on the bottom edge and the outer wall of the bearing ring can be rapidly removed, automation is easy, and energy consumption is not high.