In order to investigate the effect of rubber content on the low-medium speed tribological properties of hybrid fiber reinforced rubber-based composites,the hybrid fiber reinforced rubber-based composites with different rubber content were prepared by adjusting the rubber content in a basic formula of rubber-based friction material formula.The mechanical properties and low-medium speed tribological properties of the composites were tested,the micro morphology of the friction surfaces of different composites was observed to analyze the wear mechanism.The results show that with the increase of rubber content,the crosslinking density of the composites increases,and the hardness and density of the composites increase first and then decrease.With the increase of rubber content,the friction coefficient and friction coefficient stability of the composites presents a decrease-increase-decrease trend,and the mass wear rate increases first and then decreases.There are adhesive wear and abrasive wear in the friction process of rubber-based composites,mainly adhesive wear.A comprehensive comparison shows that when the mass fraction of rubber is 28%,the friction coefficient of the composite is moderate,and the dynamic and static friction coefficients are close,which can effectively suppress the braking noise.