Abstract: To study the influences of slot sizes, materials of friction plates and types of gasket on the mechanical properties of slot plate of friction energy dissipater used in self-centering brace, 12 groups of low-cyclic loading tests were proposed. The results show that the energy dissipation of standard holes brass-slot steel friction plates is most stable and suitable for engineering application, compared with standard holes steel-slot steel friction plates and standard holes carbon fiber-slot steel friction plates. For different slot sizes, the bearing capacity difference can be neglected with the max value of 2.27%; in the loading process, the average losses of high strength bolt pretension force and coefficient of friction are 3.7% and 2.16% respectively. The ratio of bearing capacity of the slot plate of friction energy dissipater (average stable sliding friction) and the theory friction is 92.01%. Dish gasket can properly reduce friction loss through the spring back, so it can be used in the engineering. The bearing capacity calculation formula of slot plate of friction energy dissipater used in self-centering brace was also obtained to provide a reference for engineering application.