The dynamic umbilical cable is one of the key equipment connecting the top floating platform and the subsea manifold, which transmits power, signals, hydraulic pressure and chemicals. The inner part of the umbilical cable is composed of a plurality of functional units and reinforcing units, and presents a special form of metal and nonmetal composite materials, and multi-component helical winding structures. When the umbilical cable is in operation, due to the combined effect of self weight and wave, it will endure axial tension and repeated bending load. Because there is a great deal of contact friction between the reinforced component and the functional component, the structural response of the cable (the force-displacement curve, the stress-curvature curve) shows the obvious hysteresis in the process of repeated bending. The mechanical behavior above is extremely nonlinear, thus the analytical theory can not give a precise description. With the application of ABAQUS to build the three-dimensional finite element model of the unarmored umbilical considering the spiral friction and contact effect between each unit, it is studied that the bending hysteresis of umbilical cable in tension, hydrostatic pressure, and wave load, and the nonlinear distribution of internal stress of steel tube. On this basis, it is investigated that the effects of different friction coefficients, load ratio of tension and bending, and external pressure on the nonlinear hysteretic behavior, which provides method of researching nonlinear structural mechanics of deep water dynamic umbilical cable.