Experimental studies of 29 pin-ended beam-columns, including 13 box-type and 16 L-type sections, extruded from 6082-T6 aluminum alloy, were performed in this paper to investigate the stability behavior and bearing capacity for high strength aluminum alloy. The buckling behavior, stability bearing capacity and deformation performance of all the specimens were obtained. A finite element (FE) model of aluminum alloy beam-column was conducted by analysis software ABAQUS and verified by experimental results of 29 beam-columns. Initial geometric imperfection which influenced simulation results was analyzed. A parametric study of beam-columns with different cross section dimension, regularized slenderness ratio, eccentric direction and eccentricity ratio, was performed using the FE model. Finally, Chinese code and Eurocode9 were verified and compared by the experimental data and the results of the parametric study. Meanwhile the design approach based on Chinese code for L-type cross section beam-columns was proposed. It can be concluded that the FE model proposed in this paper can well predict the stability bearing capacity and the deformation characteristic for aluminum alloy beam-columns; Chinese code and Eurocode9 can be applied to doubly symmetric box-type cross section and mono-symmetrical L-type cross section beam-columns, but they were both too conservative.