The utility model relates to a direct-current dynamic energy storage arraying device, particularly to a three-stage symmetrical dynamic energy storage arraying device formed by twelve identical direct-current voltage source type energy storage modules, twelve low-speed bilateral switches, and fly-wheel diodes connected in parallel with the twelve low-speed bilateral switches. The device has three kinds of steady-state operation modes including a four-branch parallel operation mode, a three-branch parallel operation mode, and a two-branch parallel operation mode as well as two transient operation modes generated during the mode switching process; and under each operation mode, each parallel branch has the identical number of the energy storage modules and the identical number of the switches and the states of all the energy storage modules are maintained to be consistent fundamentally. The energy storage array topological structure is simple; a few switches are used; and the comprehensive performance of the capacity utilization rate and the voltage fluctuation rate is good. When the voltage fluctuation rate is maintained to be less than 33.3%, the capacity utilization rate can reach up to 88.9%.