Bus passenger door with externally-opening escape function

The invention discloses a bus passenger door with an externally-opening escape function. The bus passenger door comprises a passenger door body. The passenger door body comprises a main passenger doorbody and a door board which are hinged sequentially. The door board is located on the side, away from the inside of a bus, of the main passenger door body and provided with a clamping board. A matching through hole is formed in the main passenger door body. A disengaging device is arranged at the end, near the inside of the bus, on the main passenger door body. When the door board rotates aroundthe hinging axis and is overlapped with the main passenger door body, the clamping board is inserted in the matching through hole and fixed by the disengaging device, and the clamping board and the disengaging device are detachably fixed. In multiple escape methods of the bus, the passenger door is the most effective way, the bus passenger door is improved and redesigned in order to overcome the escape defects of the passe