The Diguashan W-Sn deposit is the high T hydrothermal W-Sn deposit of quartz vein type, discovered in western Yunnan Province recently. It is in the inner contact between Himalayan Mapenglinggang intrusion body (Eηγb) and Gaoligongshan Group metamorphic rock, in the advantageous position of nearly SN shear fault (fissure) zone. The important breakthrough can be carried out very possibly in the ore prospecting in this area and the surrounding region.