Aerosol generating device and atomizer and main machine thereof

The invention provides an aerosol generating device and an atomizer and a main machine thereof, the atomizer comprises a liquid storage bin, an atomizing core and an atomizing electrode assembly, the atomizing electrode assembly comprises a first atomizing electrode, a second atomizing electrode and a third atomizing electrode, and the liquid storage bin is used for being inserted into the main machine of the aerosol generating device; the second atomization electrode and the third atomization electrode are sequentially arranged on the peripheral side of the first atomization electrode so that the liquid storage bin can be located at multiple positions in the circumferential direction of the main machine. The first atomizing electrode and the main machine are in a conductive state, and the second atomizing electrode and the main machine are in a conductive state; or the first atomizing electrode and the main machine are in a conductive state, and the third atomizing electrode and the main machine are in a con