The utility model belongs to the technical field of soil sampling, and particularly relates to a soil sampling device for
geological exploration. The device comprises a sampling support frame, and a linear driver is fixed on the sampling support frame. In the sampling process, the opening and closing rotating
assembly rotates to coincide with the reinforcing connecting piece, an opening in the bottom of the outer side sampling cavity is opened, soil synchronously enters the first sampling cavity and the outer side sampling cavity, multi-cavity synchronous sampling is carried out on the soil, and after sampling is completed, the opening and closing rotating
assembly is rotated, so that sampling is completed. The opening and closing rotating
assembly and the reinforcing connecting piece are staggered, an opening in the bottom of the outer side sampling cavity is closed, sampling soil located in the outer side sampling cavity is prevented from loosening, layering is more accurate, when soil is checked, the connecting structure is detached, the detachable outer
wall plate is detached from the soil sampling main cylinder, and the detachable structure is adopted, so that the sampling efficiency is improved. And an inspector can conveniently collect soil of each layered part.