Auxiliary sampling device for soil heavy metal detection

The utility model relates to the technical field of soil detection, and discloses an auxiliary sampling device for soil heavy metal detection, which comprises an annular fixing frame and supporting legs mounted at the bottom of the fixing frame, first sliding chutes are respectively formed in the inner walls of two sides of the fixing frame, a sliding plate is arranged in the center of the fixing frame, and two ends of the sliding plate are respectively connected with the first sliding chutes in a sliding manner; a driving assembly for driving the sliding plate to move is arranged in the fixing frame, a vertically-through second sliding groove is formed in the top of the sliding plate, an operation plate is slidably installed in the second sliding groove, a locking component for fixing the operation plate is arranged on the outer side of the sliding plate, a threaded hole is formed in the center of the operation plate, and an advancing screw is in threaded connection with the interior of the threaded through