The invention belongs to the feed processing technical field, and especially relates to a feed grinding and stirring device. The feed grinding and stirring device comprises a frame and a hopper. The hopper is fixedly arranged on the frame. A hollow rotating shaft passes through the hopper. The sidewall of the rotating shaft is equipped with multiple discharging holes. The rotating shaft is equipped with s threaded slot. The top end and the bottom end of the rotating shaft are each provided with a push block, an air bag and a breather pipe. Each breather pipe sleeves the rotating shaft. Each push block is arranged outside the corresponding breather pipe. Each air bag is arranged between the corresponding push block and the corresponding breather pipe. Each air bag is communicated with the corresponding breather pipe. Each breather pipe is connected with hollow curled lugs. A cylinder is connected between the two push blocks. The cylinder is provided with a motor. A blanking chamber is fixedly connected outside the hopper. A grinder is arranged over the blanking chamber. The feed grinding and stirring device helps to solve the problem that auxiliary materials cannot be evenly stirred in main materials and feed is uneven in nutrition when the main materials and the auxiliary materials are mixed in the feed.