The utility model relates to the technical field of
respiratory medicine physiological research, and discloses a
respiratory tract deposition distribution testing device for
inhalation preparations, which comprises a
respiratory tract model unit, a
head model and a
respiratory tract model unit, the respiratory tract model unit comprises a sealed container, a pulmonary trachea model and a
head model, and the air inlet end of the pulmonary trachea model extends to the outside of the sealed container; the
head model is connected with the air inlet end of the pulmonary trachea model; the
breathing machine system comprises a
breathing machine, a connecting pipeline and a
medicine feeding device, and the end, away from the
breathing machine, of the connecting pipeline is connected to the mouth and / or the
nose of the head model; and the air bag unit comprises a filtering
assembly and an air bag
assembly, the filtering
assembly is connected with the sealed container, and the air bag assembly comprises an air bag which adaptively expands and contracts when the breathing machine
system works. Under the condition that a breathing machine
system assists ventilation, the respiratory tract model adapts to running parameters of the breathing machine, the function that a real bionic breathing machine assists
human body breathing is achieved, and the deposition result of
drug particles in the respiratory tract is accurately simulated.