ObjectiveTo investigate risk assessment tools for admitting patients with mental disorders.MethodsThe risk assessment scale for admitting patients with mental disorders was prepared and the scorer reliability and predictive validity of risk assessment scale were assessed.ResultsPatient’s risk of injury on admission was assessed by the prior risk behaviors, risk behaviors of last month, and mental status on admission. According to the small sample test, the intra-class correlation coefficient (ICC) was 0.924 and the Spearman correlation coefficient of the total score of risk assessment on admission and risk behaviors after admission was 0.681.ConclusionThe scale can well assess mental disorder‘s risk behavior and is worth promoting at the department of psychiatry after enlarging samples and being revised.