If a child’s tooth is broken in half and the pulp is not exposed, resin or crown restoration is needed after desensitization treatment; if the pulp is exposed, root canal treatment and crown restoration are also needed. 1. Pulp unexposed: if a child’s tooth is broken in half, and only the dentin is exposed, it needs to be desensitized with drugs such as silver fluoride, and then filled with resin or made into crowns to restore the shape of the tooth. 2. The pulp has been exposed: If the tooth has been broken and the pulp cavity is exposed, it is necessary to choose the treatment depending on the development of the tooth, if the root development is not completed, it is necessary to perform pulp capping, pulp cutting and other apical induction molding, if the root development has been completed, it is possible to directly carry out endodontic treatment and then crown restoration. 3. If the crown of a child’s tooth is broken in half, it is necessary to go to the hospital to take pictures to check whether the root of the tooth is damaged, and the apical 1/3 of the damage can be tried to be fixed and then observed, and if the root of the tooth is broken to determine that it can not be retained, then it is necessary to extract the tooth.