In order to adapt to the intelligent operation of mobile machinery and the development of high quality operation, a new position control strategy of excavator boom is proposed. According to the target position and operation velocity, the expected operating trajectory is designed. With the proposed strategy, the boom can move to the target position along the design trajectory and ensure the position accuracy. Then a test prototype controlled by the control strategy is established, and relevant tests are carried out. The research work has universal significance to improve the automation operations efficiency and accuracy of excavator boom.