Abstract: S890 steel was developed as a cylinder cylinder material. The best process scheme was determined by heat treatment process and welding process research. The mechanical properties and corrosion resistance of cylinder cylinder material were compared, and the advantages of S890 steel used in hydraulic cylinder were analyzed. The results show that:S890 steel is applied to the cylinder of hydraulic cylinder, and its heat treatment process is:quenching temperature of 930 ℃, heat preservation for 100 min, water cooling; tempering temperature (630-640 ℃), heat preservation for 240 min, water cooling, and its narrow gap welding process is as follows:Using ER76-G welding wire, 80%Ar+20%CO₂ shielding gas, preheating 100-150 ℃ before welding, bottoming welding current 220 A, voltage 23.4 V, filling welding current 280 A, voltage 28.6 V, interlayer temperature 100-300 ℃.Among the four materials of S890, 30CrMnSi, 27SiMn and 30CrMo, the strength, toughness and corrosion resistance of the hydraulic cylinders using S890 steel are best.