Abstract: Composite masonry walls, which consist of masonry walls, tie-columns and tie-beams, possess many advantages and are widely used in China. However, it is difficult to have the structure analyzed, because of its complex working mechanics. In this paper, a new nonlinear analytical model called frame-wall model is put forward. It was verified by nonlinear finite element analytical results and test results of two tested composite masonry walls. This model was also used to analyze a tested six-story residential structure model and fine result was obtained. Conclusion is that the new model is feasible and effective.