The invention discloses a water protection coating for automobile skeletons and automobile and motorcycles wheels, which essentially comprises by weight the following components: acrylic acid modified polyester 20-55 portions, methylated amino resin 4-20 portions, colorant 2.5-30 portions, dispersing agent 1-9 portions, flatting agent 0.2-1 portions, defoaming agent 0.01-0.5 portions, solving assistant 1-5 portions, pure water 10-30 portions, ethyleneglycol monobutyl ether 5-12 portions, and thixotropic agent 1-3 portions. The film of the coating is of excellent weatherability, resistance to salt fog, resistance to acid and alkaline, resistance to water, resistance to scrubbing by solvent, excellent stiffness, high hardness and resistance to scratching, is of excellent protective and decorative role for automobile skeletons and automobile and motorcycles wheels.