The invention relates to the technical field of gear 
machining, and discloses a transmission gear burr removal device. The device comprises a rack, a rotating shaft is in sliding connection to the rack, a burr knife is arranged at one end of the rotating shaft, a 
cam is arranged on the other end of the rotating shaft in an abutting manner, a spring is connected between the rotating shaft and the top wall of the rack, the rotating shaft is sleeved with an inner ring in a spline manner, the inner ring is rotatably sleeved with an outer ring, two 
piston cylinders are fixed to the outer ring, andare located on the two sides of the rotating shaft correspondingly, the free end of each 
piston cylinder is communicated with a suctin cup used for postioning a workpiece, a 
piston is in sliding connection into each 
piston cylinder, a 
piston rod is fixed to each piston, a first 
electromagnet is fixed to each 
piston rod, each first 
electromagnet abuts against the outer wall of the corresponding 
piston cylinder, a second 
electromagnet opposite to the first electromagnet in polarity is arranged on the rack, a 
touch switch is fixed to the rotating shaft, and a swing rod used for starting and stopping the 
touch switch is hinged to the rotating shaft. A workpiece can be accurately positioned and automatically machined, and 
machining accuracy and efficiency can be improved.