Sampling device for thermal insulation layer of building external wall

The utility model discloses a sampling device for an insulating layer of a building external wall. The sampling device comprises a cutting mechanism and a sampling mechanism, the cutting mechanism is connected with the sampling mechanism, and the sampling mechanism penetrates through the cutting mechanism; the cutting mechanism comprises a cutting knife; the cutting knife comprises a bottom plate and a side plate, the side plate is arranged to be annular, one end of the side plate is connected with the bottom plate, and a groove is formed between the bottom plate and the side plate. In the sampling process of the external wall insulation layer, the cutting knife is used for cutting the external wall insulation layer, and the sampling mechanism is used for sampling the cut external wall insulation layer, so that a sample meeting experimental requirements can be completely cut at one time, and the effect of forming the sampling sample of the external wall insulation layer at one time is realized; secondary samp