The invention discloses a respirator simulation lung device for emergency nursing. The respirator simulation lung device is composed of a body, an upper substrate, a bottom substrate, a simulation lung cavity, a scavenging port, a flow sensor, a humidity sensor, a throttle control valve, an atomizing spray head, a DC servo motor, a cam, a belt, a connecting rod, a controller and a capacitive liquid crystal control screen, wherein the capacitive liquid crystal control screen is used for setting respiratory physiological parameters such as inspiratory/expiratory ratio, respiratory frequency, tidal volume and vital capacity by use of inputting of a doctor; the flow sensor is used for detecting the air flow passing through the scavenging port of the simulation lung cavity; the humidity sensor is used for detecting the humidity inside the simulation lung cavity; the controller is triggered to control the throttle control valve, the atomizing spray head and the DC servo motor to move according to the set respiration parameters, the detected flow signal and the humidity signal, thereby the air flow and the humidity. The respirator simulation lung device for emergency nursing well conforms to the human pulmonary respiration physiology, is simple in structure and high in practicability, and has an extremely high application value in occasions such as scientific experimental research, respiration physiology teaching and respiration related product inspection.