Objective To investigate the current status of the first-aid ability of nurses at different levels in outpatient clinics of stomatological hospitals, and to further explore the optimization of the training model of first-aid nurses in outpatient clinics. Methods A total of 97 nurses in our outpatient clinic from January 2019 to January 2020 were selected. The nurses were assessed by self-designed questionnaire surveys and on-site operation skills assessment to investigate the nurses' first aid ability. Results The difference in first aid ability (including relevant knowledge and operation ability) of nurses at different levels in the dental clinic was statistically significant (P<0.05). Among them, the first-aid ability of nursing staff of N1 grade (working 1 ~<3 years) is lower than that of nursing staff of N2 grade (working 3 ~ 5 years). The N3 level (working 6～10 years) first aid knowledge assessment and operation assessment scores are slightly lower than those of working N2 nurses, but the difference is not statistically significant. There was no statistically significant difference in the first aid ability in nurses of different ages, educational backgrounds, titles, and departments. Conclusion The first-aid training of nurses in oral clinics should be conducted in different levels, especially the first-aid skills training of nurses below N1 level. We should be strengthened to ensure the homogenization of nurse's first-aid training effect, which is of great significance to improve medical safety and quality of care in oral clinics.