Geotechnical investigation soil sampling device and method

The invention discloses a geotechnical investigation soil sampling device and method, and relates to the technical field of geotechnical investigation, the geotechnical investigation soil sampling device comprises a hollow drill cylinder with an open upper end, the bottom of the inner cavity of the drill cylinder is rotatably connected with a transmission shaft, the inner cavity of the drill cylinder is provided with a sample storage assembly for storing samples, the bottom of the sample storage assembly is clamped on the transmission shaft, and the transmission shaft is connected with the drill cylinder. A sampling opening corresponding to the sample storage assembly is formed in the side wall of the drilling barrel, the sample storage assembly is provided with a holding rod, the holding rod extends out of the drilling barrel, a control module is packaged in the drilling barrel, a sampling assembly is arranged at the position, located at the sampling opening, of the drilling barrel, and the sample storage as