In the rust removal work on the surface of the ship, a kind of Composite adsorption method climbing robot is designed. The composite adsorption device adopts a combination of a permanent magnet and an electromagnet, and the adsorption device is not in contact with the ferromagnetic wall surface, and the robot adopts the walking mode of the wheel. Overcome the problem that the single adsorption method is not adjustable and the adsorption force is difficult to control. In this paper, the measured values of the adsorption force of a single adsorption module and the measured values of the adsorption capacity of the composite adsorption module are compared. Summarize the advantages of the composite adsorption method; Building a climbing robot prototype platform, method of passing prototype experiment, study the effects of composite adsorption methods and mobile methods, and optimize the adsorption method.