Con Voi range in Vietnam was a southeastward continuity of the Red River Ailaoshan tertiary shear zone, a boundary between Indochina and south China blocks during the southeastward extrusion of Indochina block. It composed of high grade metamorphic and strongly deformed rocks with various protoliths. The foliation and schistosity folded to produce a large antiform structure during the late phase of ductile deformation and exhumation. Together with the Ailaoshan, Diancangshan, Con Voi range suffered from an intensively sheared and metamorphosed during the collision of Indian with Eurasian plates. The published radiochronological data indicated that the cooling age took place.