Based on the new macro—microscopic data, two ribbon types have been differentiated according to the internal fabric and developmental characteristics of the ribbon structure in the Saishitang copper deposit, Xinghai County, Qinghai Province. Detailed studies revealed that ribbon structure is a palimpsest or neomorphic directional texture(//S1 or S0) as a result of isochemical metamorphism and selection replacement of protolith, typically controlled by early formed and syntectonic planer structures, and reflects the superposition of the syntectonic contact metasomatism and regional metamorphism and deformation. Two styles of ribbon structures, respectively defined by two generations of syntectonic mineral assemblage representing the structural development and formation stage, are developed during the transition from early stage brittle ductile deformation to late stage brittle fracture for deformation manner of the host rocks. It is significant to carry out study of ribbon structures in Saishitang and to gain further knowledge about genesis and evolution of deposit.