Aiming at the current situation of heavy workload, low efficiency and easy pollution caused by manual cleaning of marine platform jacket, a marine platform jacket cleaning robot designing scheme was proposed.The cleaning robot has 8 degrees of freedom and is able to climb and locate along the jacket space and clean the jacket by holding a high pressure water gun.In order to ensure that the robot could be attached to the jacket under static and working conditions to maintain balance, a cleaning robot adsorption mechanism was designed and studied. The mechanical analysis and theoretical calculation to the cleaning robot under various conditions were carried out based on the configuration characteristics and stress conditions of the cleaning robot, and the minimum adsorption conditions for the stable operation of the robot were obtained. The static simulation experiment of the adsorption mechanism was carried out by using the finite element software ANSYS Workbench.The experimental results show that the strength and stiffness of the adsorption mechanism can meet the working requirements of the robot to clean themarine platform.