Organic fertilizer screening device

The organic fertilizer screening device comprises a screening bin, a screening plate, a crushing shell, a crushing roller set, a screening anti-blocking structure and a fertilizer conveying structure, supporting legs are arranged at the bottom of the screening bin, a feeding port is formed in the top of the screening bin, a discharging port is formed in the bottom of the screening bin, and the screening plate is arranged on the inner side wall of the screening bin. The screening plate is obliquely arranged, the fertilizer conveying structure is arranged on the side wall of the screening bin, the crushing shell is arranged on the inner top wall of the screening bin, the crushing roller set is arranged in the crushing shell (the crushing roller set and a drive thereof are both in the prior art, and the structure and the connection relation of the crushing roller set and the drive thereof are not detailed any more), and a guide plate is arranged in the crushing shell. And the guide plate is positioned above the