Convenient sampling device for underground soil

The utility model relates to the technical field of soil sampling, in particular to a convenient underground soil sampling device which comprises a support and an outer cylinder, limiting blocks are fixedly connected to the outer walls of the two sides of the bottom of the support, positioning plates are clamped to the outer walls of the limiting blocks, and positioning holes are formed in the outer walls of the two sides of the top end of each positioning plate. The inner walls of the positioning holes are connected with positioning screws through threads, sliding grooves are formed in the outer walls of the two sides of the bottom of the support, and sliding blocks are fixedly connected to the outer walls of the two sides of the top of the outer cylinder. According to the utility model, pressing is carried out through threaded driving, so that the structure is stable, linear lifting is more stable and does not incline, and the sampling structure can push the inner cylinder to rotate after penetrating into s