In order to research the seismic behavior of specially shaped columns frame structure of L-shape,this paper establishes specially shaped and same stiffness rectangular column frame structure model based on an actual project.This paper used PKPM software to calculate the models of elastic and elastic-plastic behavior and to get the elastic displacement,tensional coefficient and the collapse of the performance of the structures.The results showed that specially shaped columns frame structure of L-shape had a good seismic behavior under 7 degrees(0.15g) ground,also were better than the rectangular column frame structure seismic behavior.