Soil multi-layer sampling device

The utility model discloses a multi-layer soil sampling device, which relates to the technical field of soil sampling and comprises a sleeve, a drill bit is fixedly connected to the bottom of the sleeve, a sampling mechanism for multi-layer sampling is arranged in a top cavity of the sleeve and comprises a sampling rod sleeved in the top cavity of the sleeve, and the sampling rod is slidably connected with the sleeve; a sampling mechanism is arranged, a plurality of sampling cavities are vertically formed in the side face of the sampling rod, after the sleeve is inserted into soil, a pull handle is pulled, the sampling rod is driven to vertically ascend, a sampling opening is aligned to a soil inlet, then the soil enters the sampling opening from the soil inlet, and the sampling rod is driven to slide through the positioning assembly. And finally, the soil is collected in the sampling cavity, so that soil detection errors caused by layering disorder during soil sampling are avoided, soil at different layers c