The utility model discloses a parking braking system and use vehicle of this system. The parking braking system includes manual brake valve, control valve, the relay valve that connects gradually in the gas circuit, be connected with the parking switch that is used for controlling its switch on the control end of control valve, and the parking switch is in driving position and goes up and relative independent setting with key switch. The utility model discloses the control valve adoption of well parking braking system is controlled with the relative independent setting's of key switch control switch, like this when the emergency brake is regarded as with parking braking to needs, can directly accomplish through operation control switch, need not to cut off the general supply of vehicle, thereby guarantee under emergent braking state, the emergent pilot lamp of vehicle can not closed, just guaranteed also that the participant to other road traffic that the vehicle can be normal indicates, the emergence of road traffic accident has been reduced, driving safety has been guaranteed.