To achieve the concept of “strong column and weak beam” and further improve the performance of high strength steel frames, the hybrid strength steel frame with the end-plate joint was proposed in this paper. After verifying the FE modeling method, a total of 22 fi ne models were built and the parametric analysis was conducted to investigate the infl uence of eight factors on the initial stiff ness, fl exural capacity and ductility of the joint. The factors included the parameters of the column, the parameters of the end-plate, the parameters of the bolted connection and the compression ratio. The eff ectiveness of these factors was determined by the multivariate regression analysis. Then, the component methods provided in EC3 to determine the fl exural capacity and initial stiff ness were validated. The results indicated that the method for the fl exural capacity was reasonable while the method for the initial stiff ness showed poor accuracy. The formulas to predict the initial stiff ness were modifi ed and were verifi ed.