Abstract: Based on the plane strain theory, the steel tube for hydraulic/pneumatic cylinder casing service is produced with the prestressed, hi-rigidity and full hydraulically-operated cold-drawing bench and the deformation process for wall thickness reduction only. The drawing force, desirable wall thickness reduction and characteristics of both the cold-drawing technology and equipment are discussed, emphasizing that to enhance product quality it is crucial to take an overall control of accuracy of the technological system. Relevant operation has proven that the cylinder casing made of the hi-precision cold-dawn steel tube provides such advantages as satisfactory strength, high rigidity, good wear-resistance as well as hard inner surface and tough outer surface. The said hi-precision cold-drawn steel tube for cylinder casing service as an excellent metallic material can be processed directly into various kinds of cylinder casings.