The invention discloses a vortex plate radial disengagement preventing structure for a vortex hydrogen circulating pump. The vortex plate radial disengagement preventing structure for the vortex hydrogen circulating pump comprises a main shaft radial compensation component, three groups of small-crank radial compensation components and an anti-stagnation ring. The main shaft radial compensation component is provided with permanent magnets which are arranged at a main shaft crank pin and a crank pin shaft sleeve, and the permanent magnets are identical in polarity and bear repulsive force fromeach other. When the centrifugal force of a dynamic vortex plate is smaller than the sum of component force in the radial direction of gas force in all compression cavities, the dynamic vortex plate and a static vortex plate are limited from disengagement. Meanwhile, each small-crank radial compensation component adopts the double eccentricity design that a small-crank straight shaft penetrates through the upper eccentric shaft and the lower eccentric shaft, the turning radius can be adjusted according to the main shaft radial compensation component, when the centrifugal force of the dynamic vortex plate is larger than the sum of component force in the radial direction of gas force in all compression cavities, the dynamic vortex plate is tightly attached to the static vortex plate. The vortex plate radial disengagement preventing structure for the vortex hydrogen circulating pump can lower the requirement, of the vortex hydrogen circulating pump, for machining and assembling precisionsof the main shaft, an anti-autorotation mechanism and the like and protects the dynamic vortex plate and the static vortex plate against radial disengagement.