The invention discloses an electrophoresis protective process for an automobile rear axle end. The protective process comprising the following steps: sheathing the automobile rear axle end in a gasket firstly, and then sheathing the automobile rear axle end in a protective sleeve, wherein the protective sleeve is clung to the gasket, and the protective sleeve and the gasket form a closed space for wrapping the automobile rear axle end; and carrying out electrophoresis on a rear axle sheathed with the protective sleeve and the gasket, and taking the protective sleeve and the gasket on the automobile rear axle end down after finishing the electrophoresis at the automobile rear axle end. According to the electrophoresis protective process for the automobile rear axle end, the automobile rear axle end is sealed and protected during electrophoresis, no electrophoresis layer is formed on the surface of the rear axle end, and the following wiping operation is not required; the process is convenient to operate, the machining efficiency of the automobile rear axle is high, and the protective sleeve can be used repeatedly so that the cost can be reasonably controlled.