Abstract: Composite steel plate shear walls consist of steel plate, reinforced concrete plate and steel frame used mechanical connectors. According to the interaction differences between steel plate and reinforced concrete plate, there are two kinds of composite steel plate shear walls: combination wall and Buckling-restrained wall. Studies were carried out to estimate the reinforced concrete plate thickness and shear connectors spacing on condition that steel plate directly handle the load with RC plate don't take part in. Discussing and making some suggestions about the formulae for determining the reinforced concrete plate thickness as well as the maximum spacing of the shear connectors in order to make suggestions for Technical specification for steel structure of Guangdong Province.