Abstract: A modified test rig of QM1000-Ⅱtype wet f riction performance tester was assembled by refitting thejigger equipment , adding the data acquisition program and the data processing program of the f riction torque. A paper-based f riction material reinforced by cellulose fiber was prepared by using the paper-making method. The relationship between load and f riction torque characteristics and the effect of load on the static coefficient and dynamiccoefficient of f riction of paper-based f riction material were investigated. The result s show that the torque magnitudeof both static and dynamic f riction increases with the increasing of load , the static coefficient of f riction increases linearly and the dynamic coefficient of f riction declines as increasing of loads. The duration time of the torque curve ofstatic f riction is independent of loading. Experiment data of static torque are more accurate and more reliable by automatic method than by manual method. The experiment result s will have guide significance for design of operationparameters of a wet clutch and optimizing the composition formula of f riction materials.