Children with double rows of teeth (clinically known as retained milk teeth) are recommended to seek medical treatment for extraction of milk teeth. Retained milk teeth is a common dental disease in children, mainly seen during tooth replacement; due to the lack of normal loss of milk teeth during tooth replacement, resulting in the ectopic eruption of secondary permanent teeth, i.e., the phenomenon of double rows of teeth. It is recommended to consult a doctor for the extraction of milk teeth in time so that the secondary permanent teeth can return to their normal positions; the method is to first apply local anesthesia to the milk teeth that need to be extracted, and then use the extraction forceps or dental extractor to extract the milk teeth and apply pressure to stop bleeding. In addition, to prevent retained milk teeth, it is recommended to chew more hard objects to promote the normal loss of milk teeth, and should not eat too much bread or snacks and other soft foods.