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A three-dimensional contact model of 1 ×7 steel strand was established.Contact point was searched by Splitting-pinball algorithm,and Augmented-Lagrangian algorithm was applied for analysis of contact loads.The exerted tensile loads to the model were analyzed using finite element method.After analyzing calculation results,the laws of steel wire stress distribution in axis direction and in its cross-section were found.Friction coefficients were set as 0.10,0.1 l,and 0.12,respectively,to obtain the influence law of friction coefficient to steel wire stresses.Research result shows that friction coefficient has significant influence on the shear stress of steel wire.Analyzed the calculation results of steel strand with five different lay pitch multiples and got the influence law of lay pitch multiple to the stresses of steel wire in steel strand.The Von Misses stress of steel wire increases following with the increasing of lay pitches multiples,but the increment value is not very prominent.The shear stress of steel wire decreases following the increase of lay pitch multiple,and the changing amplitude is large when lay pitch multiple is small.Finally,carried out a steel strand tensile deformation test and the consistency of test results with the calculation results shows that the selected model is reasonable.