Objective To explore the mechanism of Fuke Zhixuexiaotong Keli in rats model of incomplete puerperal involution of uterus by detecting the expression of metalloproteinases-9(MMP-9) and tissue inhibitor of metalloproteinase-1(TIMP-1) in the uterine redintegration incomplete model.Methods Seventy-two SD female rats were randomly divided into 6 groups:blank group,model group,Chanfukang group,and high-,middle-,low-dose of Fuke Zhixuexiaotong Keli group.The model of incomplete puerperal involution of uterus was established,and MMP-9,TIMP-1 gene expression level in each group were detected by in situ hybridization detection of uterine tissue.Results The expression of MMP-9 and TIMP-1 could be successfully detected in each group.The expression of MMP-9 in model group was significantly higher than the control group,and the expression of TIMP-1 was lower.The mRNA of MMP-9 gene was significantly decreased in both high-,middle-and low-dose of Fuke Zhixuexiaotong Keli group and Chanfukang group(P