Atomizer and aerosol generating device using same

The invention discloses an atomizer and an aerosol generating device applying the atomizer, the atomizer comprises a shell, an atomization support and a heating assembly, the atomization support is located in the shell, an atomization cavity is formed in the atomization support, and the heating assembly is located in the atomization cavity; at least one heat insulation assembly is arranged on the outer side of the atomization cavity and comprises a heat insulation cavity. The heat insulation cavity is formed in the outer side of the atomization cavity, the heat insulation cavity conducts heat insulation through air in the cavity, the heat conductivity coefficient of the air is low, and the air is a good heat insulation medium; therefore, the technical problems that in the using process of a product in the prior art, when continuous multi-mouth suction is conducted, the handheld position, close to the atomization core, of the shell is overheated, the scalding feeling is caused, and the user experience is poor