The height of the upper and lower openings of the analyzer and the size of the upper and lower openings affect the fineness of the ultrafine mill. If the size of the sizer opening is not adjusted during the installation process, the grinding operation will be affected. Analyze the fineness of the low-grinding ore on the machine, and the fineness of the upper-grinding will be fine. The lower the opening of the machine is, the fineness of the grinding is relatively fine, the lower opening is large, and the fineness of the phase grinding is relatively fine, otherwise it is the opposite; The wear condition of the analyser blade affects the grinding fineness of the ultrafine mill. After the wearer of the analyser blade is worn, it will cause the reduction of the amount of return sand. As a result, the grinding fineness will become coarser. If the wear is serious, the classifier life will be affected. Therefore, in the normal operation, it is necessary to pay attention to checking the wear condition of the analysis machine blades. The article mainly introduces the analysis machine's influence on the fineness of ultrafine mill products. The above is mainly introduced from four aspects. The analysis in each aspect is very detailed. It is hoped that everyone's understanding and use will help.