Abstract: By the detailed study of regional geological background, geological features of ore and wall rock alteration, it is defined that the material source of the Muyufang gold deposit is originated from the Archean hypogene metamorphic rock-the Desheng gneiss complex. The regional magmatic thermal dynamics make the Au remobilize and fill along the fractures. The multi-stages of filling,alteration and cementation finally form the auriferous quartz vein type of orebody. The deposit was formed in Late Triassic epoch, with a typical genesis of hydrothermal alteration.