Abstract: An innovative multi-ribbed composite shear walls with concrete filled steel tubular (CFST) columns was presented as anti-lateral force component in prefabricated buildings.In order to study the compression-bending behavior,calculation formulas in cracking,yielding,peak-loading,and ultimate-loading state were established based on the assumption of plane section,by integrating the material constitutive model and the force mechanism in various states,as well as introducing the graphical coefficients equivalent rectangular stress.The manifestation of theoretical models and relevant building codes in predicting the bearing capacities were contrastively analyzed.ABAQUS software was carried out the numerical simulation of such composite walls.The degradation verification of the calculation method was conducted by combining with existing test data,which revealed that the proposed formula can accurately predict the compression-bending capacity at all stages,and the theoretical values are in better agreement with the experimental results.The positive and negative deviation exceeds 30% on account of the design codes,while the established formulas can reasonably describe the actual bearing capacity.Comparing with the numerical results,the theoretical model accuracy and the finite element model reliability are verified.Finally,the main factors influencing the compression-bending formula were discussed.It indicates that the bearing capacity and deformability enhance with increasing steel stirrup ratio and properly restraining axial compression ratio and aspect ratio.Among key parameters,the steel stirrup ratio has the most significant effect on compression-bending performance.