OBJECTIVE:To study the effect of Runchangtongbian mixture (an agent of loosing bowel to relive constipation) on bowel propulsion in mice. METHODS:The coom propulsion percentages in bowel in Runchangtongbian mixture group, model group (treated with bowel propulsion suppressants) and blank group were computed and compared, and the data were analyzed statistically. RESULTS:As compared with the blank group, bowel propulsion was greatly enhanced in Runchangtongbian mixture group(P