The physical and mechanical properties of ordinary viscose fiber and some kinds of other regenerated cellulose fibers, such as bamboo charcoal viscose fiber, anion viscose fiber, aloe viscose fibers and Modal fiber have been studied in this paper. The results show that there is a big relationship between physical and mechanical properties and external characteristics of the fibers, for example, the shape, crystallinity, mechanical properties, moisture content and wick effect have obvious influence on fiber characteristics.