Based on a seven-year filedexperiment，the effects of Chinese milkvetch(CMV)incorporation on the dynamicsof soilpH，organicmatter(OM)，availablenitrogen(AN)，availablephosphorus(AP)，available potassium(AK)and the activities of soil invertase，urease and acid phosphatase(ACP)were investigated depending on the fertilizations:(1)without fertilizers(Control，CK)，(2)mineral fertilizers(NPK)and(3)mineral fertilizers combined with CMV(NPK+CMV).Soil sampling was done at 2th，4th，8th，16th and 32th day after CMV incorporation，jointing stage，booting stage and harvest of early rice.In general，the dynamics of soil characteristics and enzyme activities weresignificant，and were almost consistent with the nutrients release ofCMV.Compared to NPK，NPK+CMV improvedsignificantly the pHvalue.There were no significant difference on invertaseactivity，AN and ureaseactivity，which maybecaused by the high content of OM and AN in the backgroundsoil.Oppositely，theAP，AK and ACP content were higher inthe NPK+CMV treatment than in the NPK+CMV treatment and the control when the background soil had low AP andAK.Inconclusion，the effects of CMV on soil fertility were limited by the basic nutrient ofsoil.