The invention relates to a method for applying calcium polyenoic acid to the medical cosmetic field. Calcium polyenoic acid, or calcium octadecadienoic acid, or calcium octadecatrienoic acid is made into paste or oil type spray for curing burn and scald, sunburn, decubitus, ulceration, frostbite and trauma; the calcium polyenoic acid and excipient is made into a medical cosmetic product for resisting crease, removing acne, comedo, speckle and dead skin, reducing sweat pore, removing scar left by acne, preventing sunburn, brush-burn, skin wound, burn and frostibite, resisting freeze, preventing crack, fading and sun, repairing and restoring, and repairing wound skin; the calcium polyenoic acid has the effects of whitening and moistening skin, promoting the growth of epithelium, preventing hemorrhoids and rhinitis, repairing injured tissues, promoting the auxesis, diminishing inflammation, relieving pain and resisting the mosquito, and is used for adjusting vessel occlusion, thrombus and wound healing; propanediol or propanetriol is made into reserve water aqua for being prepared water aqua or paste for curing dermatitis, rhinitis, canker sore, vagina sore, colpitis, hair wound repair, gastritis, gastric ulcer and acne.