Effects of mowing practices on soil mite community in alkalinized grassland of leymus chinensis in the Songnen Plain were studied from May to October in 2005,with reference to community paraments such as generic richness, abundance,biodiversity,MI(Mesostigmata),and MGP(Oribatid).A total of 1 515 soil mite individuals was collected, belonging to 3 sub-orders,61 genera.The results indicated that the number of soil mite individuals was significantly lower in Treatment MP(Mowing Practice)than in Treatment FE(Fencing enclosure),and the difference in diversity(H' index and SR index)between MP and FE were also significant.The results also suggested that MP mainly decreased the proportion of k-selection groups of soil mites(Mesostigmata)and obviously affected living of Macropyline group(Oribatid).