The river pebble sand making machine produced by Hongxing Machine has the following characteristics: small particle size, uniform particle size, large production capacity, long hammer life, low supporting power, changing three-stage crushing into two-stage crushing, simplified process, simple structure, convenient maintenance and stable operation. The equipment investment is 35%-50% lower than the traditional process equipment of the same scale, and the output efficiency is 35%-50% higher than the traditional process equipment of the same scale. Take limestone as an example: the particle size of a finished product ≤5mm accounts for more than 85%. The operation and maintenance cost is 35%-50% lower than that of traditional process equipment of the same scale, and it is widely used in machine-made aggregate, cement, refractory, metallurgy, chemical industry and other industries.