The invention discloses a gear burr removing mechanism comprising a working table. A reducer is connected in the working table through a motor and connected with a vertical column. The vertical column stretches out of the upper surface of the working table. A circular disc is fixedly arranged on the vertical column. The circular disc is provided with a plurality of small vertical columns. Clamping disks are arranged on the middle portions of the small vertical columns. A button controlling the motor to operate is arranged on the working table. The burr removing device is simple in structure. A plurality of gears can be placed for one time. Because the clamping disks support the gears, the efficiency of burr removing can be improved.