The difference between root canal treatment for milk teeth and root canal treatment for permanent teeth mainly includes the following aspects: 1. The root canal filling material for milk teeth should be chosen as an easily absorbable material so that the milk teeth can be lost in time and eventually replaced by permanent teeth; 2. The operation is relatively simple during the root canal treatment for milk teeth, while the root canal treatment steps for permanent teeth are strictly required to clean the root canal as well as root canal tight three-dimensional filling; 3. The root canal treatment for milk teeth is mainly to cure the lesion because the milk teeth are eventually replaced by permanent teeth and eventually lost, and it is difficult for children to cooperate with the treatment.