The invention belongs to the field of equipment for
geological exploration, and particularly discloses a soil sampling device for the
geological exploration. The soil sampling device comprises an inner cylinder and an outer cylinder which are sleeved with each other, wherein the outer cylinder can rotate outside the inner cylinder and can move vertically relative to the inner cylinder, a soil
cutting assembly is arranged at the bottom in the outer cylinder and comprises a plurality of soil
cutting ropes and a plurality of threading assemblies, the plurality of threading assemblies and the plurality of soil
cutting ropes are in one-to-one correspondence, each threading
assembly comprises a fixed ring and a threading ring which are fixed at the bottom of the inner wall of the outer cylinder,one end of each soil cutting
rope is fixed on the fixed ring, the other end penetrates through the threading ring and extends out of the top of the outer cylinder, and each soil cutting
rope is divided into a transverse cutting part and a vertical moving part by the fixed ring and the threading ring of each threading
assembly. The bottom of a soil sample in the inner cylinder can be completely
cut off through rotation of the soil cutting ropes, adhesion between the soil sample and
subsoil is
cut off, and when the inner cylinder is lifted upwards for soil sampling,
pull force of the
subsoil onthe soil sample in the inner cylinder is absent, so that the success rate of soil sampling is greatly increased.