This paper introduces the unloading and loading process and bulk loader, processes flow of water dedusting system, model selection calculation and control system of the machine-made sand warehouse in the aggregate production line, and compares the water dust removal system with the bag dust removal system. The actual use effect shows that when the "spraying + dry fog" water dust removal process is adopted, the water dust removal system is a mechanical and electrical integrated automatic control system, which can be interlocked with the loading system. It has the purging function, which can realize the pipeline emptying and purging in winter, automatically adjust the atomization amount of the nozzle, and accurately control the moisture content of the material. The investment of water dust removal system is relatively small, and the installed power and power consumption are relatively low. It is a beneficial supplement to the existing dust removal process of mechanical sand storage, and can improve the dust pollution control level of aggregate enterprises.