Abstract: In order to better find out the performance of the new regenerated cellulose fiber yarns and the targeted development of products, pure yarns of six categories of new regenerated cellulose fibers such as lyocell fiber, modal fiber, bamboo pulp fiber, sheng-bast fiber, richcel fiber and outlast modified viscose fiber, and blended yarns with Cotton, Polyester were chosen as the research object. . Six indexes such as breaking tenacity, breaking elongation rate, work of rupture, 3 mm and above hairiness index (harmful hairiness), elastic recovery, Wear-resisting number were tested and evaluated. The result shows that the pure yarns of Lyocell fiber, Modal fiber, and blended yarns of Modal blended with superfine viscose and Richcel fiber, Sheng-bast fiber blended with Bamboo pulp fiber, Polyester fiber have better comprehensive performance, blended yarns of Modal blended with Cotton, pure yarns of Bamboo pulp fiber and blended yarnsof Bamboo pulp fiber blended with Cotton（18.4tex）have general comprehensive performance, pure cotton yarns, Bamboo pulp fiber blended with Cotton（14.8tex）blended yarns, outlast modified viscose fiber and various blended yarns have poor comprehensive performance. The suggestion of product development and production - processing was proposed.

Key words: regenerated cellulose fiber, mechanical property, gray cluster analysis, yarn