The invention relates to the field of metallurgy technology, in particular to a material blocking protection device for a conveyor belt chute. A detection baffle and a travel switch are arranged outside the conveyor belt chute, and the detection switch is connected to a movable baffle arranged inside the conveyor belt chute. Shaft connection, so that when the material is blocked in the conveyor belt chute, the movable baffle will swing due to the thrust of the material, and then drive the detection baffle to swing and hit the travel switch, so that the conveyor belt will stop running, thus effectively improving the blocking effect. The sensitivity of the material alarm and shutdown process can avoid the generation of false signals and improve the production efficiency. Moreover, the device has the characteristics of simple control principle, high stability, flexible action, good use effect, low cost, etc., and has strong practicability.