Abstract: The present invention relates to the technical field of an automatic detection trigger device, and discloses an automatic detection trigger device for a quantitative compressed administration aerosol. The automatic detection trigger device for the quantitative compressed administration aerosol includes a main machine body, wherein the main machine body consists of a main machine front cover, a main machine rear cover, a battery module and a driving assembly; the driving assembly includes a driving control module and a driving gear module; a charging port is formed at an outer side of the main machine front cover; a limiting pedestal is clamped at a bottom end of the main machine front cover; and an aerosol medicine is fixedly mounted at the bottom of an inner cavity of the main machine front cover.