The invention provides an
aerosol generating device, comprising a
gas pipeline, a liquid pipeline and an
aerosol pipeline. A gas outlet is arranged in the
pipe wall of the
gas pipeline; the
gas pipeline is communicated with the end opening located at the first end of the
aerosol pipeline through the gas outlet; the
pipe wall of the aerosol pipeline is provided with a liquid inlet; the liquid pipeline is communicated the aerosol pipeline through the liquid inlet; the
diameter of the gas pipeline is greater than the
diameter of the aerosol pipeline; the
diameter of the aerosol pipeline is greater than the diameter of the gas outlet; and the liquid inlet is close to the first end. According to the aerosol generating device,
high pressure gas first passes through the gas pipeline at first, then through the gas outlet with a small diameter and finally through the aerosol pipeline; because of
high pressure of the gas, the flow rate at the small outlet increases sharply, cross section increases from the small outlet to the aerosol pipeline, so siphonage is generated, which allows medicinal liquid to be sucked from the liquid pipeline to places surrounding air flow; and the high-speed air flow cuts the liquid into particles of various sizes and ejects the particles out at a high speed, thereby forming aerosol.