Selenium-rich organic biological soil sample sampling device

The utility model relates to the field of soil sampling equipment, in particular to a selenium-rich organic biological soil sample sampling device which comprises a supporting plate, positioning pins are symmetrically and fixedly connected to the bottom end of the supporting plate, a sampling barrel is embedded into the top end of the supporting plate in a sliding mode, and an embedded rod is placed in the sampling barrel. Placing holes are formed in the outer walls of the embedded rod and the sampling barrel at equal intervals, a hollow rod is rotationally connected to the top end of the embedded rod, sliding grooves are rotationally and symmetrically formed in the positions, close to the interiors of the placing holes, of the outer wall of the hollow rod, connecting plates are slidably embedded into the sliding grooves, and an arc-shaped plate is fixedly connected to one side of each connecting plate; according to the soil sampling device, the arc-shaped plate can be conveniently rotated, the position of th