The invention discloses a self-foaming sunscreen, which is composed of deionized water, glycerin, butylene glycol, propylene glycol, methyl p-hydroxybenzoate, EDTA-2Na, potassium cetyl phosphate, decyl glucoside, and allantoin , Xanthan Gum, Dipotassium Glycyrrhizinate, Ethylhexyl Methoxycinnamate, C12‑15 Alcohol Benzoate, C12‑20 Alkyl Glucoside, Dimethicone, Caprylic / Capric Glycerin Triester, Dioctyl Carbonate, Methylenebis-Benzotriazolyl Tetramethylbutylphenol, Ethylhexyl Triazone, Diethylaminohydroxybenzoyl Hexyl Benzoate, VP / Eicosene Copolymer, Polyhydroxystearic Acid, Cyclopentasiloxane, Tocopheryl Acetate, Cyclotetramethicone, Dimethiconol, Propylparaben , aluminum stearate, Novec HFE‑7100, etc. The self-foaming sunscreen lotion of the invention not only has good sunscreen effect, but also makes people feel more refreshed and breathable.