A small wall climbing robot was introduced, which was used for the detection of wind power tower, especially for the fast detection of wind power tower which was difficult to detect manually.The overall structure of the robot was designed. The adsorption structure of the robot was calculated and simulated. The dynamic analysis of the robot was carried out to verify the calculation results of driving torque. The dynamics simulation of the robot was carried out to determine the stability of the output torque of the driving mechanism. The experimental results show that the robot can run safely and stably on the tower surface.