Multi-layer screening device for soil samples

The invention discloses a multi-layer screening device for soil samples. The multi-layer screening device comprises a box body; the crushing mechanism is arranged at the upper end of the box body; the pair of adjusting mechanisms are symmetrically mounted on the inner walls of the two sides of the box body, and the ends, close to each other, of the pair of adjusting mechanisms are connected with the crushing mechanism; the grinding mechanism is mounted in the middle of the box body and is positioned below the adjusting mechanism; the screening mechanisms are mounted at the bottom of the box body; the extraction box is mounted at the bottom of the box body, is positioned at the bottom of the screening mechanism and is used for collecting screened soil samples; the crushing degree of the crushing mechanism can be adjusted, the screening speed can be increased through shaking, use is convenient, and the working efficiency is high. 本申请公开了一种土壤样本多层筛分器，包括:箱体；设置在所述箱体上端的粉碎机构；对称安装在所述箱体的两侧内壁上的一对调节机构，且一对所述调节机构相互靠近的一端均与所述