An exemplary atomizer includes a housing, a conductive part at an end of the housing, a mouthpiece with an air outlet, a liquid chamber, and at least one heating element. The liquid chamber is in the housing and configured for storing tobacco liquid. The at least one heating element is electrically connected to the conductive part. The heating element includes a liquid carrier and a heating part integrally formed with the liquid carrier. The liquid carrier has a micro porous structure. The liquid carrier is in contact with the tobacco liquid. The liquid carrier is configured for absorbing the tobacco liquid, and the heating part is configured for heating the tobacco liquid to form aerosol.