The invention provides an environmentally-friendly aqueous spray paint liquid, a propellent, an
aerosol coated environmentally-friendly aqueous spray paint and a preparation method of the paint. The liquid comprises, by weight, 30-45 parts of aqueous resin, 5-15 parts of a
pigment, 15-30 parts of a cosolvent, 20-35 parts of water and 0.5-2 parts of an assistant. The environmentally-friendly aqueous spray paint liquid adopts an aqueous resin
system, so a whole paint film has a good hydrophobic and oleophobic effect, and improvement of the quality of spray paint products is facilitated; water is used to substitute parts of a
solvent, so the VOC is reduced, and
environmental protection is realized; and the produced environmentally-friendly aqueous spray paint has good sprayability and a high spray rate, and a film formed by the paint has high fullness, excellent
hardness, adhesion, glossiness, flexibility and
impact resistance, and has abundant and gorgeous colors, excellent decorative effect, good
ageing resistance, and
extremely good antirust and protection functions.