An atomizer with adjustable air intake quantity is disclosed including: an atomizer body, having a liquid storage chamber formed therein for storing tobacco liquid； an aerosol generator, configured for aerosolizing the tobacco liquid from the liquid storage chamber to generate an aerosol； at least one air inlet, formed on the atomizer body； an air pipe, disposed inside of the atomizer body and configured for conducting the aerosol to flow along the air pipe； the air inlet being in communication with the air pipe； and an adjusting cover, connected with the atomizer body by a thread to cover the air inlet； the adjusting cover is configured for being rotated to move up and down along axial direction of the atomizer body, to adjust a clearance between an edge of the adjusting cover and the atomizer body.
