By using CAN bus protocol and CPU C8051F040/1,an electronic system based on CAN technique to control the tractor electro-hydraulic hitch was designed. The communication network，hardware circuit，and software program are researched and constructed. Based on these designs, a new method of distribution and definition for identifier (ID) and information data code was proposed. The system will be able to be used to control and monitor the tractor hydraulic hitch. 