Heating device

The utility model relates to the technical field of electric appliances, and discloses a heating device, which comprises at least three layers of heating components and a telescopic component, an accommodating space is formed between every two of the at least three layers of heating components, the telescopic component comprises a guide component and an elastic piece, the guide component is respectively connected with each layer of heating component, and the elastic piece is arranged in the guide component. The two ends of the elastic piece are connected with the two ends of the guide assembly correspondingly, and the elastic piece is used for making every two adjacent heating assemblies get close to or away from each other so that the containing space can be reduced or increased. At least three layers of heating assemblies are arranged, the containing space is formed between every two layers of heating assemblies, at least two parts of food can be heated at the same time, the heating capacity and the heating