Four species of Trichodoridae from Kunming,Yunnan Province of China were described,which were Trichodorus nanjingensis,Trichodorus rinae,Trichodorus cedarus,and Paratrichodorus porosus collected from soil around roots of pear(Pyrus spp.).Among them,T.rinae was a new-recorded species in China,T.nanjingensis,T.cedarus and P.porosus were reported firstly in Yunnan Province.