Abstract: Objective:To explore the trends of suicide mortality among people aged 10-24 years in China from 2005 to 2020, and to provide scientific basis for the prevention of suicide among young people.Methods:Based on the data of rural-urban suicide mortality rate among people aged 10-24 years in China Health Statistical Yearbook from 2005 to 2020 and China Statistical Yearbook of Health and Family Planning from 2013 to 2020, the age-period-cohort(APC)model and the intrinsic estimator method were used to estimate the age, period and cohort effect of suicide mortality.Results:The suicide mortality rate among people aged 10-24 years in China had been on the rise in recent years.The results of the APC model showed that the risk of suicide mortality among people aged 10-24 years increased with age.The period effect fluctuated over time, with an increasing trend since 2015, and the cohort effect showed a decreasing trend followed by an increase.Conclusion:The risk of suicide among young people in China has become more serious in recent years.More effective interventions are needed, to prevent further increases in the risk of suicide mortality of young people.