In order to solve the problem of difficulty in cleaning the tunnel reflective ring,an automatic cleaning robot for the tunnel reflective ring was designed.The main frame of the robot,the walking device,the cleaning device and the intelligent detection system were planned and designed respectively,the main functions and implementation methods of each part were determined,and the main frame was statically analyzed using ANSYS Workbench.The real tunnel environment test results of the robot prototype show that the tunnel reflective ring cleaning robot has a reasonable structure and control design,working in good condition,and completes the cleaning of the reflective ring without affecting the normal opening of the tunnel.