For the existing magnetorheological fluid(MRF) does not apply in tractive elevator magnetorheological brake, studying the tribological performance of MR fluid is critical, related to the brake effectiveness. Four kinds of MRF was prepared with graphite, grease of silicone fluid for extra additives. Simulation of MRF in elevator transmission device by four-ball test machine, recording the friction coefficient changing of MRF, the size of wear scar was observed and measured by image microscope. The rheological properties of MRF before and after friction experiment were measured by rheometer, and the influence of friction and wear on performance of the MRF in the device was analyzed. Test and analysis results shows that the additive can reduce the friction of MRF to a certain extent, the rheological properties are increased after friction, the MRF with 0.5% graphite has low zero-field viscosity, high yield shear stress, and good stability, which is suitable for the MRF of traction elevator brake.