The invention relates to a device for processing spilled coals of a belt conveyor. The device comprises a flow collecting cover, a lifting hopper, a bracket I, a flow divider, a bracket II, a curve coal dropping pipe and a material receiving scoop, and further comprises a feeding baffle plate, a controllable flow chute, a material guiding groove and a supporting mechanism (not shown in Figure 1), wherein the feeding baffle plate is arranged at the head part of an upstream belt conveyor; the flow collecting cover and the lifting hopper are both arranged above the bracket I; the flow divider is arranged between the bracket I and the bracket II; the curve coal dropping pipe is arranged below the bracket II; the controllable flow chute is connected with the curve coal dropping pipe; the material receiving scoop is arranged below the controllable flow chute; the material guiding groove is arranged above a material receiving belt; the supporting mechanism (not shown in Figure 1) is arranged below the material receiving belt. With adoption of the device for processing spilled coals of a belt conveyor, the spill and leakage of materials of an expansion section is reduced, the coal conveying efficiency of the belt conveyor is improved, and the spill of coals is reduced.