Abstract: Since the elastoplastic damage occurs in the plastic stage of shear walls under a severe earthquake, the accurate modeling of the inelastic response of shear walls is primary to assess the aseismic safety and performance-based aseismic design. A structural elastoplastic analysis program MEASP which bases on macro elements is developed with object oriented language and the multiple-vertical-line-element model (MVLEM) is implemented in MESAP. The nonlinear macro element MVLEM is adopted to simulate the nonlinear behavior of shear walls designed according to Chinese code under a cyclic reverse loading test，and according to incorporating material constitutive relations as well as the uniaxial spring constitutive relation proposed by Fischinge. The hysteretic curve agrees well with the test, which indicates that the MVLEM is suitable to simulate the strong nonlinear behavior of shear walls accurately.