Multifunctional soil screening device

The utility model relates to the field of soil screeners, and particularly discloses a multifunctional soil screener which comprises a grinding barrel, the grinding barrel comprises a straight pipe, an annular grinding net and a frustum-shaped inner plate, the frustum-shaped inner plate is arranged in the middle of the interior of the straight pipe, and the frustum-shaped inner plate and the straight pipe are fixedly connected with the inner side and the outer side of the annular grinding net respectively; the grinding barrel comprises the straight pipe, the annular grinding net and the frustum-shaped inner plate and is matched with the barrel cover, the center shaft, the rotating arm and the grinding rod, the rotating arm is rotated to drive the grinding rod to rotate, the soil sample can be ground and screened at the same time, and in the operation process, along with the change of the height of a limiting nut, the grinding efficiency is improved. When the sample is processed, the pressure between the grind