The invention relates to a simulation dust generating system. The system comprises a feeding hopper, a belt conveying mechanism, a bucket elevator and a circulating hopper. A discharging opening of the feeding hopper is led to a belt conveying mechanism, and the discharging end of the belt conveying mechanism is led to the feeding end of the bucket elevator; the discharging end at the high position of the bucket elevator is communicated with the feeding end of the circulating hopper through a feeding channel; and the discharging end of the lower portion of the circulating hopper is to the belt conveying mechanism, and the discharging opening of the feeding hopper, the discharging end of the belt conveying mechanism, the feeding end of the circulating hopper and the discharging end of the circulating hopper are each provided with a dust suction pipe. The simulation dust generating system is adopted, so that materials with different granularities and in different states can be fed into the system to run; according to needs, the materials can be heated, and therefore the dust generation states of different materials can be simulated; the system drives the materials to circularly run, and continuous dust generation can be achieved; and the running speed of the system is adjusted so that the different dust generation amounts can be adjusted, and the more precise dust source can be provided for the dust removing technological research.