Abstract: The load-following control mode of the liquid metal fast reactor is in the theoretical research stage. While the physical and the thermal-hydraulic characteristics of the liquid metal fast reactor are different from those of pressurizer water reactor, which brings great challenges to the operation and reactivity control of the reactor. In order to realize the load-following capacity of the liquid metal fast reactor, it is necessary to design a reasonable and feasible reactor control strategy and corresponding control systems. Taking the liquid metal fast reactor as the target of study, the system program model is established, based on which the reactor control system model is built. By considering the general operation requirement and the liquid metal physical and thermal characteristics, the reactor control strategy is proposed. The normal operating transient simulations and large load step transients are performed to verified the control strategy. The results show that for normal operating transients, the control system strategy has good control performance and high operating flexibility. The study of load following capacity lays a foundation for the flexible operation of the liquid metal fast reactor, which is beneficial to expand the application scenarios of the liquid metal fast reactor and improve the operational economics.