First of all, the feeder is responsible for evenly feeding the limestone into the heavy hammer crusher for primary crushing; Since the output is greater than 800 tons, a light hammer crusher is added, the material broken by the heavy hammer crusher is transported by belt conveyor to the light hammer crusher for secondary fine crushing, and finally the fine crushed material is sent to the vibrating screen to screen out different specifications of stone, the stone that does not meet the particle size requirements is fed back to the light hammer crusher for further crushing.