With the increasing of crude oil mining depth，the temperature of crude oil is increased,it inevitably affects the swelling and wear behavior of screw pump stator rubber.The swelling and tribological behaviors of nitrile rubber(NBR)samples with three different acrylonitrile contents(ie,N18,N26 and N41)in crude oil at different temperature were investigated using static immersion and MPV600 ringonblock wear experiments,respectively.The results show that the mass change rate of N18 and N26 is increased linearly with the increase of oil temperature,but that of N14 is slightly declined.The hardness of N18 and N26 is gradually declined with the temperature increasing but that of N14 remains unchanged.With the increase of oil temperature,the wear loss of NBR after immersion is increased but the friction coefficient is decreased gradually.The increasing acrylonitrile content in NBR enhances the intermolecular forces,and improves the behaviors of swelling resistance and wear resistance.