Abstract: With electro-magnetic simulating equipment established on the ground Cu-Pb binary immiscible alloy are produced successfully,and microstructure and friction performance of the alloy samples are analyzed and tested.The analyzed results of microstructure show the alloy specimens produced on electro-magnetic simulating microgravity condition overcome severe phase separation due to gravity,the minority phase of simulating samples are well distributed in matrix,the lower contents of the minority phase is,the smaller size of dispersive phase is and the better it are distributed;test results of friction performance show friction performance of simulating samples is evidently better than the matrix metal,friction factor become small and wear properties rapidly reduce first and slowly increase later with increase of the minority phase contents.Simultaneously the test results are analyzed and discussed briefly.