4kg。To realize the high productivity of dairy cow, the pH value of rumen for single dairy cow must be kept stable. The amount of concentrated feed has a significant effect on the fluctuation of pH value. In order to keep the pH value stable, the concentrated feed must be given precisely. Based on the technology of RFID and MCU, a kind of movable precising feeding machine for single dairy cow was designed. This kind of machine can realize the precise feeding of concentrated feed. Through one-month feeding experiment in the dairy cow farm, the output of milk increases by 4 kg per day. 