Geological sampling device for coal field geological exploration

The utility model provides a geological sampling device for coal field geological exploration, which comprises an automatic sampling mechanism, and the automatic sampling mechanism comprises an L-shaped plate, a screw rod, a connecting block, a sampling pipe, a first motor and a gear. A first motor drives an outer gear ring to rotate through a gear, the outer gear ring drives a sampling pipe to rotate through a circular block, a second motor drives a moving block to move through a screw to extrude a connecting rod, the connecting rod drives a connecting block to move downwards, and the connecting block drives a circular block to move downwards through a rectangular plate. The vertical rod drives the push block to take out the soil in the sampling pipe, so that automatic sampling is facilitated, the sampling pipe does not need to be manually held by hand to exert force downwards and is rotationally inserted into the soil for sampling, time and labor are saved, and the soil in the sampling pipe is conveniently