This paper studies the electro-hydraulic proportional position control system of a hydraulic rock drilling jumbo. First of all, the composition of the system is introduced and the transfer function of the system components is established, and the mathematical model of the whole system is finally obtained through calculation and simplification. Then, the PID and the fuzzy PID control strategy were designed by MATLAB software, and the system model was built in simulink. Finally, the results indicate that the fuzzy PID controller has better anti-interference ability, and the response speed is more advantageous than that of PID.