More crushing and less grinding will reduce the grinding particle size of the ore milling plant. The larger the grinding particle size, the greater the work done by the ore milling plant on the ore, and the grinding efficiency of the ore milling plant will naturally be affected.In order to achieve qualified grinding fineness, the workload of ore milling plant is bound to increase and the energy consumption will also increase.To reduce the feeding particle size, it is required that the particle size of crushed products is small, that is, "more crushing and less grinding".In this way, the feeding particle size is appropriate, and the grinding efficiency of ore milling plant will be improved.