The paddy field mixer is connected to the tractor with a three-point suspension. The power output shaft of the tractor is transmitted to the spline shaft of the beater through the transmission shaft, and then is reduced by a pair of spiral bevel gears and changes the transmission direction, and then driven by the spline long shaft 11 The gear is driven by the chain drive 14 gears to drive the knife shaft assembly to rotate, and the paddy field mixer uses the rotating motion of the special combined mixing blade and the forward motion of the tractor to carry out the stubble burial operation.