Fersilicite is a rare Si and Fe metallic mineral.Up till now, five sorts of mineral facies have been discovered, namely gubeiite (Fe3Si)，xifengite ( Fe5Si3 )，fersilicite (FeSi)，ferdisilicite (FeSi2) and suessite (a-Fe3Si)，of which the first two minerals were found in the alluvial bed of Yanshan area, belonging to cosmic dust minerals. In 1980，Hong Wenxino first reported the discovery of ferdisilicite in Tibet and Gansu; afterwards, this mineral was successively found in such provinces (regions) as Jiangsu, Anhui，Xinjiang, Liaoning，Hebei and Zhejiang，and its host rocks are magmatic rocks, sedimen- tary rocks and metamorphic rocks, with mafic and ultramafic rocks being dominant. The host rocks were formed from Archean to Cenozoic, and the southern Zhejiang Proterozoic metamorphic area seems most widely distsibu- ted. Ferdisilicite of China contains Fe 41.1%一49.90o and Si 49.1%-55.9%， being deficient in Fe and rich in Si as compared with the theoretical values. In addition, ferdisilicite contains such minor elements as Mn, Al，Ce, Eu, whose contents are different in different areas. Besides fersilicite, the associa- ted minerals of ferdisilicite include sporadic native silicon (Si)，and this has been confirmed by mineralogical and electron microprobe analyses and X-ray diffraction data. The areas producing primary native silicon so far known include Liaoning，Zhejiang and Fujian. Genetically, fersilicites axe derived either from mantle magma or meteo- rite falling.The fersilicites in the southern Zhejiang metamorphic area might have been related to the Archean meteorite falling event.