Abstract: In order to evaluate the importance of fusion-fission hybrid reactor (FFHR) in the future fuel cycle, FFHR symbiotic systems mass balance calculations were carried out. Nuclear energy development scenarios were studied according to nuclear power development status and long-term development planning, and long-term(2030, 2050) development strategy research in China. The growth rate of Chinas economy, population and per capita electricity consumption were taken into account. Chinas installed capacity of nuclear power plants before 2100 was calculated. Four scenarios were assumed as different types of fuel cycle and material balance models were established accordingly. The results show that PWR, FR and FFHR symbiotic model could minimize the demand for natural uranium and save spent fuel disposal cost.