Objective To evaluate the reliability and validity of the Reflective Function Questionnaire for Youth(RFQY). Methods School sample:a total of 1 813 students from the fifth grade primary school to the second grade high school were selected for the study(aged 10 to 17 years). Clinical patients:another 52 adolescents(aged under 17 years)with borderline trait who attended Department of Psychiatry in Shengjing Hospital were recruited. All subjects completed the RFQY,basic empathy scale( BES )and emotional intelligence scale(EIS). After 3 weeks,85 students were randomly selected and filled in the questionaires again. Results The internal consistency of the RFQY was 0.73,and the test?retest reliability was 0.686(P<0.001). The RFQY scores of the school students were significantly higher than those in clinical patients(8.71±0.65 vs 8.10±0.89,P<0.001). The RFQY scores of male students were significantly lower than those in female students(8.61±0.67 vs 8.78±0.63,P<0.001). The score increased with the age increased(P<0.001). Conclusion The Chinese version of RFQY shows good reliability and validity , which can be used to measure the reflective function of adolescents in China .