Rim floating damping wheel for non-pneumatic tire

The invention provides a rim floating damping wheel for a non-pneumatic tire. The rim floating damping wheel includes a floating damping rim and a non-pneumatic tire; the floating damping rim includesan inner spoke plate and an outer spoke supporting ring, wherein a plurality of lateral buffer supports are arranged between the inner spoke plate and the outer spoke supporting ring; a radial elastic supporting function of the floating damping rim is achieved by horizontal compression springs two ends of which are supported between the adjacent lateral buffer supports, radial compression springsand tension springs; the non-pneumatic tire includes a tire body and a lining; the lining is pressed in the tire body in the circumferential direction; the lining is made of steel wires or nylon wires; a plurality of heat dissipation cavities are formed in an inner ring of the tire body in the circumferential direction; a plurality of counter bores are formed in two side surfaces of the tire bodyin the circumferential dir