Graphite material feeding device into the QWJ-60 classifying fine mill for primary grinding. After several online circulation after grinding by the cyclone collector and dust collecting materials to the secondary griding machine(a secondary griding machine by QWJ-30 classifying fine mill, Ultrafine Classifier, cyclone, pulse dust collector, blower connected in series. The material outlet of Ultrafine Classifier under sent to a mill for grinding plastic. After several times, the spherical graphite product is obtained. The material collected by the pulse dust collector is conveyed through the pipeline through the pipe, and sent to the finished product packaging line for centralized packaging. The full set of production line is controlled by the automation.