The invention discloses an environmentally-friendly water-based strippable coating used for automobiles as well as a preparation method and application of the coating. The environmentally-friendly water-based strippable coating used for the automobiles is composed of the following raw materials in percentages by mass: 30-55% of an A component: a fluorine-silicon modified waterborne self-crosslinking acrylic emulsion; 20-35% of a B component: a waterborne polyurethane dispersion; 10-20% of a C component: a water-based color paste; 3-9% of a D component: an auxiliary agent; and the balance of water. The invention also discloses a preparation method and use method of the environmentally-friendly water-based strippable coating used for the automobiles. According to the method provided by the invention, silicon-fluorine modification is performed on the acrylic emulsion which is used as a main film-forming substance of the coating, optimization post-treatment is performed on the polyurethanedispersion, and the special functional auxiliary agent material is introduced, so that the weather resistance and medium resistance of a traditional water-based strippable coating are greatly improved, the requirements for a strippable coating used for automobile decoration or protection in the market are met, and the method takes into account the characteristics of high gloss, good stripping performance and no damage to a surface original paint.