Abstract: As a common electromagnetic nondestructive testing method, magnetic flux leakage detection is widely used in wire rope detection. To solve the difficulty of high-altitude wire rope detection, a detection device capable of autonomously capturing and detecting wire ropes was developed. Based on a design method combining rigid structure and flexible drives, a four-degree-of-freedom flexible robotic arm with a magnetic flux leakage detection probe at the end was designed. It used a pneumatic proportional solenoid valve as the control unit and an encoder as the feedback unit, achieving high-precision control of the flexible robotic arm joints. According to the morphological characteristics of wire ropes, an axis centerline feature matching method was proposed, realizing the function of binocular vision positioning of wire rope positions.