The utility model discloses a device for preventing chemical fertilizers from being scattered, relating to the technical field of chemical fertilizer packaging. The device is used for solving the waste problem caused by the reason that chemical fertilizer particles on a rear-side conveyor belt are scattered on the ground after a front-side conveyor belt stops, so that the workload of cleaning the site by workers is alleviated. According to the device for preventing chemical fertilizers from being scattered provided by the utility model, brackets are respectively arranged on two sides of a conveyor belt; hydraulic cylinders are hinged on the top of the brackets; supporting rods are hinged on the top of a belt rack; the free ends of the supporting rods are hinged with piston rods of the corresponding hydraulic cylinders; baffles are fixedly arranged on the multiple supporting rods on each side of the conveyor belt; flexible pads are respectively and fixedly arranged on the two baffles; and after the piston rods of the multiple hydraulic cylinders completely extend out, the two baffles are set into a () shape, and the chemical fertilizer particles are limited in a certain space and can be effectively prevented from being scattered on the ground.