Children with broken lips need to be treated separately after oral examination and taking full-mouth surface tomography films. If the soft tissue of the lip is contused and superficially located, saline and hydrogen peroxide solution can be applied to rinse alternately, and iodophor can be applied to the wound surface, and cold compresses can be given as soon as possible to induce capillary constriction, thus reducing exudation and swelling. If the inner mucosa of the lip is cracked, accompanied by the fracture of the incisive edge of the front teeth, the sharp edges of the teeth should be adjusted and ground in time, and after the soft tissue wound is thoroughly cleaned, the wound edge should be trimmed under local anesthesia and the wound should be sutured in place. If the lip is penetrated with the skin to form a penetrating injury, thorough debridement is required, followed by layer-by-layer suturing to close the dead space and placement of rubber drainage strips.