Abstract: In order to prevent the feeding cow being disturbed by butting of other cows during the time they are in a concentrate self-feeder, an equipment of entrance guard and pen which can identify the dairy cow with the RFID was developed. The equipment can detect the dairy cow location and automatically control the railing of the entrance guard work. The reading distance of the RFID reading system was 52.3 cm, the time to open the railing of the entrance guard was 3.92 s. It can make the dairy cows cozily feed concentrates and be satisfied with the welfare demands of feeding. Moreover, the equipment can improve the concentrates use efficiency.