Soil grading screening device for monitoring

The utility model relates to a soil grading and screening device for monitoring. The device comprises a soil crushing device, a grading and screening device and a sample collecting device. The soil crushing device comprises a barrel-shaped shell fixed to the supporting frame. A motor is installed below the shell, blades connected with the motor are arranged in the shell, an impurity discharging port and a soil discharging port are formed in the side face of the shell, and a sealing cover is arranged at the top of the shell. The grading screening device comprises a cavity composed of a bottom plate with supporting legs, baffles I arranged on the two sides of the bottom plate, a screening plate arranged in an inclined mode, a horizontal plate connected with the tail end of the screening plate and a sealing cover connected with the baffles I. A sample collecting device is arranged in the cavity; the screening plate is composed of screening sections I-III and a buffering section. Buffer sections are arranged betw