The utility model relates to a metal outer sheath cable, particularly a metal outer sheath cable which has the advantages of good waterproof property, strong pressure resistance and good flexibility. The utility model is characterized in that a welded and formed stainless steel sheath is longitudinally covered outside cable cores, and the surface of the sheath is rolled with closed annular bamboo joint ripples. Thereby, the cable has strong longitudinal water baffling capability. When water enters the end of the cable, or the water enters the end of the cable owing to breakage, and after the water enters the stainless steel outer sheath of the cable, a water baffling layer and a buffer belt of the cable absorb the water, and cause the outer sheath to rapidly expand. Thereby, the bottom of the annular bamboo joint ripples of the cable cores of the cable and the stainless steel outer sheath forms an expansion and closed space, and the longitudinal infiltration of the water is prevented. In addition, the strength of the bamboo joint ripples is higher than that of thread ripples, the utility model can raise the pressure resistance of the cable, and the pressure resistance can be increased above 5%. The annular bamboo joint ripples have good flexibility, thereby, the annular bamboo joint ripples are favorable to cable laying and installation. The cable is especially suitable for transferring electric power by rail traffic, such as light rails, subways, etc.