The invention provides a push-pull type cleaning protective device used for assembly welding and pipe lining of a heat exchanger pipe bundle assembly. The push-pull type cleaning protective device consists of a plurality of movable cleaning units which are stacked up, wherein the movable cleaning units are pushed and pulled to proper positions, and a limiting gate and a protective door are closed, so that an enough sealed operation space can be formed; in the formed sealed operation space, operations such as assembling and welding are carried out on the heat exchanger pipe bundle assembly, so that a manufacturing process can be kept clean; after use, the push-pull type cleaning device is restored to a stack-up state, and is moved to a proper position, so that space usage is small, and the storage is convenient; the push-pull type cleaning protective device is simple and reliable in structure, is reusable, is wide in scope of application, is free of requirements on a special using environment and working conditions, is simple in operation of arranging and cleaning environment, is obvious in cleaning effect, is free of consumption and loss in a using process, and is low in manufacturing and using cost.