Abstract: Shizhuyuan W-Sn-Mo-Bi polymetallic deposit is located in the north side of the Nanling E-W direction tectonic belt midpiece，and it is one of the important ore deposit in Dongpo ore field.With the microscopic observation and scanning electron microscopy analysis，we discuss the characteristics of main ore components and mineral compositions.The results of scanning electron microscopy analysis show that the main ore minerals include scheelite，molybdenite，bismutinite and wolframite etc；some scheelites in the skarn -type ores of Shizhuyuan deposit develop girdle structure and the chemical components of each girdle varies greatly.The different content of Mo is the main reason that results in this phenomenon.Molybdenite，bismutinite and other minerals are widely distributed and closely associated，mainly to fine-grained disseminated distribution in fluorite，quartz and feldspar，formed later than the magnetite and scheelite.Wolframite is shaped granular structure distribution，and wrapped in a containing structure by scheelite，with directionality，and non-metallic mineral veins in the same direction.