The utility model provides a be applied to current limiting device of bulk cargo harbour belt conveyor system, including a well structure of an essay, stand, connecting plate, baffle, crossbeam, opening baffle box, sticky tape, bearing roller group, the crossbearer, the storage silo, a structure of an essay is connected with the stand in two parallels, and the stand is connected with the crossbeam, and the opening baffle box passes through the connecting plate to be connected with the crossbeam, and the baffle sets up between the opening baffle box, and the upper portion of baffle is connected with the crossbeam, and tape -stripping organizes with the bearing roller, and on the structure of an essay, the storage silo lay in between two baffles during bearing roller group was fixed in through the crossbearer. Belt conveyor can be solved to this device makes the transportation material of excess lead to the fact the problem of harm to gathering and processing kind device because of the feed is inhomogeneous, three scrapers can make inventory control at the maximum capacity within range, avoids spilling in the transportation material to but continuous conveyor, the material is restrainted to the ration, reduces manual cleaning's cost, the certain degree improve factory's environment.