The invention discloses a scar repair formula and a preparation method thereof. The scar repair formula comprises a phase A, a phase B, a phase C, a phase D, a phase E and a phase F and is prepared byadopting specific ratio, taking recycled silicon as the main material and sodium hyaluronate and hydroxymethyl chitosan as the auxiliary materials compounded with other auxillaries; the recycled silicon serving as the main component can form a three-dimensional mesh bracket structure consistent with the structure of human bones and soft tissues, endogenous cell repair is achieved, orderly growthof cells is benefited, and healthy cells are proliferated to form new tissues; sodium hyaluronate increases the adhesion of the recycled silicon to skin tissues; other auxiliaries promote the absorption of the preparation at the scar site; the components act together to form a reasonable regulatory mechanism during scar repair, inhibit hyperplasia of fibrous protein, promote organized growth of the tissues to complete scar repair.