Abstract: In order to improve the friction and wear properties or ultrahigh molecular weight polyethylene (UHMWPE) under low speed and high normal loads conditions, composites consisting of hollow glass microspheres (HGM) treated with coupling agent and UHMWPE were prepared by hot pressing. The hardness and the crystallinity of composites were characterized, and the friction and wear properties of composites were measured by ball-disk reciprocating friction test in condition of high normal loads and dry friction. As the results, the hardness and the crystallinity of composites with a small amount of HGM added are higher than that of the pure UHMWPE. The friction coefficient of composites in a short time becomes higher to a certain extent as the content of HGM rising, and the wear rate decreases first and then increases. The composite with 1wt% HGM content has the lowest wear rate, the wear rate of which decreases by 44.7% and 48.4% in the friction tests under normal loads of 50 N and 100 N respectively compared with the wear rate of pure UHMWPE. With the increase of friction time, the friction coefficient and wear rate of the composites increase to varying degrees. The composite with 2wt% HGM has the lowest average friction coefficient during 120 min-friction-test, and the wear rates of pure UHMWPE and HGM/UHMWPE composites containing a small amount of HGM are close.