Soil infiltration characteristics of water conservation forest in Yuanyang terrace were studied with double-ring method under six typical plantations(Alnuscremastogyne(Ⅰ),Alnuscremastogyne(Ⅱ),Cunninghamia lanceolata(Ⅲ),Di l leniaindica L inn.(Ⅳ),Cunninghamia lanceol ata+Quer cus cerr i s(Ⅴ),Castanopsis or thacantha F ranch.(Ⅵ)) in May to June,2010.Results showed that(1) Soil infiltration was closely related with soil physicochemical properties and litter water-holding abilities,etc.The infiltration rate was positively related with soil noncapillary porosity,aeration porosity,noncapillary capacity,total porosity,saturated water content,soil organic matter,soil total N,total K,hydrolysis N and litter water holding ability,and negatively related with soil bulk density,capillary porosity as well as capillary moisture conntent.(2) There existed great difference under different vegetations for initial,steady-state and mean infiltration rate.Initial in filtration rate followed the order of Ⅵ>Ⅲ>Ⅴ>Ⅵ>Ⅱ>Ⅰhillsides; both steady-state and mean infiltration rate followed the order of Ⅴ>Ⅲ>Ⅵ>Ⅳ>Ⅱ>Ⅰ> hillsides.These results suggested infiltration performance in Yuanyang terrace area forest soil was good with permeability index of each plantation soil larger than waste hillsides.Soil permeability under Cunning hamialanceolata and Cunning hamialanceolata+Quercuscerris vegetation was the best.