Abstract: Aiming at the construction technology of drilling and anchoring integrated anchor bolt, a control system of drilling and anchoring integrated anchor bolt drill is designed. According to the working principle of the drill anchor integrated anchor rod drill, the hardware composition scheme of the control system is designed. According to the construction process of drill anchor integrated bolt, the automatic control program is designed. The system uses PLC as the controller to judge the working state of the roof bolter through the pressure, which can realize the automatic construction of the hydraulic roof bolter. Aiming at the problem that the chip bit is easy to wear and break, a constant pressure control method based on PID algorithm is proposed. The field test results in coal mine show that the constant pressure control method has the smallest feed pressure fluctuation, the feed pressure variance is 0.18, and the average value is 3.3Mpa. The control system of drill anchor integrated roof bolter can realize the automatic operation of roof bolter and has high reliability and stability.