Brake structure of rack rail vehicle driving system and rack rail vehicle

The invention provides a braking structure of a rack rail vehicle driving system. The braking structure comprises an axle, a gearbox frame, an eccentric mechanism, rack rail wheels, a braking mechanism and an adjusting mechanism. The gear box frame and the eccentric mechanism are mounted on the axle; the toothed rail wheel is mounted on the eccentric mechanism; the brake mechanism comprises a brake hub, a brake belt and a driving device, the brake hub is mounted on the toothed rail wheel, and the brake belt wraps the brake hub; the output end of the driving device is connected with the brake belt so as to drive the brake belt to tightly hold or loosen the brake hub; the adjusting mechanism comprises a support and a connecting piece, the support is rotatably installed on the gearbox frame, and the support is connected with the output end of the driving device; the connecting piece is connected with the eccentric mechanism and the support so as to drive the support to rotate to adjust the position of the brake