Abstract: The stainless steels of 1Cr18Ni9Ti and 1Cr13 were welded through deterministic craft by tungsten inert-gas(TIG) welding.The microstructure and fracture pattern of weld joints of 1Cr13 martensite and 1Cr18Ni9Ti austenite stainless steels were observed and analyzed by means of LOM and SEM, the mechanical properties of the weld joints were measured with micro-hardness tester and electronic universal stretcher, and the polarization curves and AC impedance spectroscopy of weld joints were tested by seawater immersion test of simulation solution.The results show that adopting manual TIG welding through electrode negative to direct current soldering machine to weld 1Cr18Ni9Ti austenite stainless steel and 1Cr13 martensite stainless steel is feasible;under suitable process(welding current is 80 A, welding speed is 110 mm/min), weld joints can obtain good appearance and uniform structure;mechanical properties and galvano-chemistry properties can meet use requirements.