Objective To describe the cross-cultural adaptation of the original English version of Decision Conflict Scale（DCS）,and test the reliability and validity of the Chinese version of DCS. Methods The English version of DCS was translated into Chinese and cross-culturally adapted according to a standardized procedure recommended by American Academy of Orthopaedic Surgeons.The Chinese version was tested in 250 patients with rectal cancer for reliability and validity. Results The Chinese version of DCS consisted of 16 items.Factor analysis extracted 3 factors,which could explain 65.481% of the total variance.The content validity index was 0.989；the Cronbach′s α coefficients of the total scale and 3 factors were 0.886, and 0.706-0.911, respectively；the Guttman-split-half reliability was 0.869. Conclusion The Chinese version of DCS has good reliability and validity,and meet the psychometric properties requirements.It can be useful for monitoring decisional conflict level of rectal cancer patients in clinical practice.