In order to improve bearing load capacity of journal bearing to meet the designing requirement for a great power journal bearing,by adding a shallow groove on texture bearing,a groovetexture composite journal bearing was designed.A numerical simulation analysis model of a groovetexture composite journal bearing was established,and the effect of groove on friction and load capacity of texturing bearing was studied by using computational fluid dynamics (CFD).The results show that the groovetexture composite structure can enhance the load capacity and integrated performance of journal bearing.The size and distribution of groove has a great influence on bearing performance.For given texturing parameters,when the grooves are arranged in the upstream region of the texture and the groove axial length is longer than the circumferential side,the overall performance of the journal bearing will be improved obviously.For a given operation condition,the bearing capacity can be increased by optimal design of groove depth,groove aspect ratio and the circumferentially area of groove respectively,and the friction and end leakage of the bearing can be reduced simultaneously.