Aiming at the problems of low detection efficiency and accuracy of rebar connection sleeve in current industrial production,a PLC-based intelligent detection production line of rebar connection sleeve was designed to effectively improve the detection efficiency of rebar connection sleeve.The main structure and working principle of the production line were introduced,and the hardware composition and control method of the intelligent detection and automatic rotary positioning system in the equipment were expounded.The control system with PLC as the core and the touch screen as the man-machine interface was designed,the hardware structure diagram and main control element models were obtained,and the connection and programming problems of PLC were introduced in detail.For pneumatic systems,the principle diagram of the pneumatic system and the main pneumatic component models were obtained.The hand automatic control screen was designed in the touch screen,and the development of the data logging and alarm recording function modules was realized.The test results of the production prototype show that the system runs stably and reliably,and after further optimization and improvement,it can replace manual inspection in large quantities.