The invention relates to an inclined plate type device for preventing lump coal from being broken in the process of entering a bin. Steel rails are paved at the top of the bin, so that a belt conveyor can move reversibly and the bin distribution requirement during high bin position can be met; and lump coal is gathered by a short inclined plate, the lump coal subjected to speed reduction can turn to slip along the inclined plate of the bin at a low speed by virtue of the gravitational potential energy of the lump coal, a buffering mechanism at the lower end part of the inclined plate of the bin performs secondary buffering speed reduction on the low-speed lump coal, and the lump coal slips into the storage along the conical slope of the bin by virtue of the gravitational potential energy of the lump coal, so that the process of the lump coal entering the bin without being broken and without broken points is implemented. The device can realize natural gathering, buffering speed reduction, low-speed slip and natural distribution and storage of the lump coal under the all-day unattended condition, realizes high utilization ratio of the bin volume and automatic warning in high storage position, overcomes the defects of the traditional device for preventing the lump coal from being broken in the process of entering the bin, solves the problem that the lump coal is broken when entering the bin, and has the characteristics of small investment, high efficiency and operating reliability.