Abstract: Described here in the essay are the experimental processes as well as the typical results of the functional modules of the Gleeble 3500 test machine, including hot tensile, hot compression, hot torsion, and dynamic CCT curve.Technical parameter optimization of the major manufacturing processes of the seamless steel tube such as continuous casting, piercing and hot rolling by the Gleeble 3500 tester are well demonstrated via the application of the physical and mechanical property data as obtained during the thermal-mechanical deforming simulation process to guiding seamless steel pipe development and preparation of the hot processing technology.Moreover the possible applications of the said thermal simulation tester to future product design and process optimization concerning production of the seamless steel tube are previewed.