Objective To investigate the effect of root apical formation on the treatment of young permanent anterior teeth injuries. Methods According to the conventional apical apical operation, the Ca (OH) 2 paste was capped, the tip of the self-tapping nail was repositioned, and the resin was repaired. Results 78 cases of 86 teeth, 78 successful teeth, failed eight teeth, the success rate of 90.7%. Conclusions Dentinal apical formation should be gently rubbed and disinfected strictly. The use of calcium hydroxide and pulp-entraining agent can increase the success rate and repair it in time, and at the same time allow patients to meet the requirements of postoperative operation.