The aging process plays an important role in the production of viscose staple fibers. This process can not only reduce the degree of polymerization of raw cellulose, make the viscose produced moderately viscous, which is conducive to filtration and spinning, and but also make the degree of polymerization of alkali cellulose more uniform after pressing, thus improving the quality of yellowing viscose. There are two kinds of old equipment widely used in the production line of viscose staple fibers, old box and old drum,which have their own advantages and disadvantages in actual production, can be selected and applied according to the specific process characteristics.