Absorption-thermal desorption apparatus

The invention relates to an absorption-thermal desorption apparatus, which has a coaxial four-layer structure from inside to outside, wherein the first layer is an absorption layer, both ends of the absorption layer are filled with air-permeable plugs, the second layer is an absorption pipe and is a metal stainless steel pipe, the third layer is an insulating layer, the material of the insulating layer is a high temperature resistance material, the fourth layer is an electric heating wire layer, the electric heating wire is tightly wound on the insulating layer in a spiral manner, a temperature sensor is arranged on the middle of the absorption pipe and between the insulating layer and the electric heating wire layer, and both ends of the absorption pipe are provided with absorption pipe joints. The absorption-thermal desorption apparatus has characteristics of simple structure, rapid heating rate, rapid cooling rate, wide application range and low power consumption, and is suitable for portable instruments.