Based on the technology of MCU, one kind of dairy cow precise feeding equipment was designed. This kind of equipment used computer as information management platform, MCU as data processing and control platform, and used the RFID technology to identify dairy cows. The working parameters of the equipment were established and the feeding accuracy of the equipment was verified. By using the equipment, one-month feeding experiment in the dairy cow farm was conducted. The results showed that the milk production per day was increased by 3.9kg, and the average fat content of milk was 3.74g/(100g), the average protein content of milk was 2.98g/(100g).