Abstract: The inner structure of ?3.2m×13m high-fineness grinding mill which matches with roller press is introduced, which capacity is 100t/h ( the maximum capacity can get 115t/h ). Compare with traditional high-fineness grinding mill inner structure which is inadaptable with roller press. The rotary inner structure solve such problems as low capacity, high temperature in mill and frequent plugging, improve production efficiency, reduce energy consumption, and get great economic benefits for enterprise.