Objective To translate LARS Score into Chinese and examine the reliability and validity of the LARS Score to predict patient bowel function.Methods A convenience sample of 40 Chinese rectal patients was recruited sequentially from a tertiary first-class hospital in Tianjin.The patients were assessed for bowel function using the LARS Score after anterior resection.Data were collected to conduct reliability tests on test-retest,inter-rater and constant,construction validity.Results The field test demonstrated excellent repeatability with an ICC value of 0.9615 (95％CI 0.9272～0.9796); inter-rater reliability was high with an ICC value of 0.9394 (95％CI 0.8854～0.9680).Content validity was excellent which CVR was 0.90.Constructive validity was good,factor analysis extracted two common factors,which could explain 60.659％ of the total variance,and each item on the corresponding factor had satisfactory factor loading quantity (＞0.4).Conclusions The Chinese version of LARS Score is easy to use and convenient to understand; the evidence collected in this study has shown good reliability and validity of using the LARS Score in assessing bowel function of Chinese rectal cancer patients.