Stock bin sampling device

The invention discloses a stock bin sampling device, which comprises: a fixing frame, the fixing frame is suitable for being mounted on the outer side of a stock bin, and the fixing frame is provided with an embedded pipe penetrating through the side wall of the stock bin; the sampling piece is movably mounted on the fixing frame, penetrates through the embedded pipe and extends into the stock bin, and a sampling groove for collecting a sample is formed in the sampling piece; the sample pressing and returning assembly is installed on the fixing frame, the sample pressing and returning assembly comprises a sample pressing piece, a sample returning piece and a sample returning pipe, the sample pressing piece is used for pressing a sample in the sampling groove, the sample returning piece is used for opening the sampling groove so that the sampling groove can be communicated with the sample returning pipe, and the sample returning piece is used for pressing the sample in the sampling groove. And the sample retur