Material anti-tumbling device for coal grate of car dumper

The utility model relates to a car dumper coal grate material anti-tumbling device which comprises a car dumper platform, a car entering platform is fixedly installed on the inner side of the car dumper platform, a protection assembly is fixedly installed on the top of the car entering platform, and the protection assembly comprises an installation bin with one end fixedly connected with the top of the car entering platform. An air cylinder is fixedly installed on the bottom wall of an inner cavity of the installation bin, a displacement assembly with one end penetrating and extending to the top of the installation bin is fixedly installed at the top of the air cylinder, a connecting plate is fixedly connected to the top of the displacement assembly, and a supporting plate is fixedly connected to the outer side of the connecting plate. After the car dumper coal grate material anti-tumbling device is attached to the top of a rail vehicle entering a car entering platform, materials contained in the rail vehicle