Objective To improve prevention and treatment related knowledge of decayed teeth and oral health awareness for children and parents, and to reduce the incidence rate of decayed teeth in children. Methods During the waiting period in stamotology outpatient department, 200 child-parent dyads （experimental group） received caring class education on decayed teeth, including on-site lecture, operation demonstration and scenario simulation, then they were investigated on oral heath knowledge and health education satisfaction, which were then compared with those of the other 200 dyads （control group） who only received routine health education. Results After the health education, the oral health knowledge and health education satisfaction of the experimental group were significantly higher than those of the control group （P＜0.01 for both）; 92.5% dyads in the experimental group thought their oral health knowledge had improved after the caring class education, and 100% thought their oral health awareness had enhanced. Conclusion Conducting the caring class education during the waiting period in stamotology outpatient department can improve oral health knowledge of children and parents, and enhance their health education satisfaction, which reflects humanistic care of medical staff for children.