Abstract : This paper mainly designs an electro-hydraulic servo control system for a deep hole drilling machine. The system structure is designed, mathematical models of each component and the overall system are established, and the mathematical models are linearized. The linearization coefficients of the system's operating point are calculated, and the system's transfer function is obtained. A fuzzy adaptive PID controller is designed, which combines the advantages of fuzzy control and PID control. Based on an expert system, it can self-tune and self-optimize PID parameters online, exhibiting good dynamic and static performance and good adaptability. The controller design is implemented using the fuzzy logic toolbox in MATLAB, and a system simulation model is established using the Simulink toolbox. The design results are simulated and analyzed. The simulation results show that the system has good dynamic and static performance, fully verifying the system's reliability. The hardware composition of the system is studied, and the software development of the real-time control system is carried out using Visual Basic. The software system has a user-friendly interface and is easy to operate. It successfully realizes the functions of real-time data acquisition and real-time control decision output, and effectively completes the communication between the computer and the control system. Keywords : Deep hole machining; Hydraulic servo control; Fuzzy adaptive PID control; Simulation; Visual Basic; Software system Introduction This paper designs an electro-hydraulic servo control system for a deep hole drilling machine. This system is used to simulate stability control during deep hole drilling and plays a crucial role in machining, especially in deep hole machining. The structure of the DF deep hole drilling machine electro-hydraulic servo control system is designed, mathematical models of each component and the overall system are established, and the mathematical models are linearized. The linearization coefficients of the system's operating point are calculated, and the system's transfer function is obtained. A fuzzy adaptive PID controller is designed, which combines the advantages of fuzzy control and PID control. Based on an expert system, it can self-tune and self-optimize PID parameters online, exhibiting good dynamic and static performance and good adaptability. The controller design is implemented using the fuzzy logic toolbox in MATLAB, and a system simulation model is built using the Simulink toolbox. Simulation analysis of the design results is performed. The simulation results show that the system has good dynamic and static performance, fully verifying the system's reliability. [Full text download of "Design and Research of Electro-hydraulic Servo Control System for DF Deep Hole Drilling Machine"]