The invention relates to a scar repair agent. The scar repair agent is prepared from components in parts by weight as follows: 1-2 parts of oat polypeptides, 0.5-6 parts of a fructus chaenomelis extract, 0.05-1 part of a snail secretion fluid, 2-4 parts of L-sodium pyrrolidonecarboxylate, 0.1-0.5 parts of diguanosine tetraphosphate, 1-2 parts of cytokine liposome, 3-6 parts of ethylhexylglycerin, 10-20 parts of olive oil, 2-4 parts of alkyl glycoside and 30-50 parts of water. The scar repair agent contains coordinated ingredients, has a remarkable scar repairing effect, has no irritation to skin, is high in safety, has the efficacy of moisturizing and tendering skin and resisting oxidation and ageing, can effectively fade scar stains and inhibit hyperpigmentation to recover skin to the natural state, evens skin color and can smooth lines and promote skin firmness.