The invention discloses a clinical emergency respiratory system for internal medicine department. The system comprises a movable chassis, wherein an air purification box is mounted at the lower end inthe movable chassis; an air treatment box is arranged on a base; a heating resistor screen device is mounted in the air treatment box; a sucking pump is connected to a transfer air tank; the transferair tank is connected to a joint of an external connecting pipe; a control host computer is mounted at the upper end of the movable chassis; and a display screen and a control keyboard are mounted atthe upper end of the control host computer. The system disclosed by the invention is stable in structure, stable to operate, convenient to move and control and simple to operate, can achieve an emergency respiratory function, can achieve an oxygen supply function, can achieve a function of supplying mixed gas of oxygen and air, can achieve a function of humidifying and heating the gas to preventthe gas from stimulating patients, can be used by the patient to breathe, is various in function and meets existing using demands.