Soil screening machine

The utility model relates to the field of soil remediation, and discloses a soil screening machine which comprises a box body, two oppositely-arranged feeding plates are arranged in the box body, a crushing mechanism is arranged on the lower sides of the feeding plates, and the crushing mechanism comprises a first rotating shaft and a second rotating shaft which are parallel to each other and rotationally connected to the box body. A plurality of crushing blades are mounted on the outer walls of the parts, located in the box body, of the first rotating shaft and the second rotating shaft; a sieve plate is arranged on the lower side of the crushing mechanism, a cleaning mechanism is arranged on the side, close to the crushing mechanism, of the sieve plate, a transmission mechanism is installed on the outer side of the box body and comprises a motor, a first gear and a second gear, the motor is fixedly connected with a first rotating shaft, the first gear is installed on the first rotating shaft, and the second