IDS intelligent dry separator and ZM intelligent mineral high efficiency separator are combined to realize the all particle size dry selection of raw coal. The best separation particle size of ZM intelligent mineral high-efficiency separator is - 80mm, and IDS intelligent dry separator can be responsible for the separation of materials with particle size above+80mm. The all particle dry coal preparation equipment system composed of the two machines' respective advantages can effectively eliminate the reject in materials with different particle sizes, reduce the crushing cost, inhibit the generation of secondary coal powder, and greatly improve the calorific value of the product.