Abstract: When L-shaped steel-reinforced concrete (SRC) rectangular columns are applied as corner columns in high-rise buildings, the problems of indirect force transmission and stress concentration caused by the discontinuity of T-shaped steel reinforced concrete columns can be avoided. In order to reveal the mechanical properties of L-shaped SRC columns under eccentric compression, five L-shaped SRC rectangular columns and one T-shaped SRC rectangular column with different load eccentricity, slenderness ratio and different steel distribution, respectively. All these specimens were tested under eccentric compression. The results showed that L-shaped steel developed crack asymmetrically under the non-uniform constraint of concrete; at the same cross-section height, the reinforcement and steel in the tension and compression zone of L-shaped steel SRC column did not yield concurrently. However, the steel asymmetry does not significantly reduce the bearing capacity and ductility of the specimens. Based on the experimental study, a finite element model was established to analyze the effects of eccentricity, slenderness ratio and web eccentricity on the mechanical properties of L-shaped steel SRC columns under eccentric compression. The model analysis showed that the boundary of the tension and compression zones of L-shaped steel SRC columns was an oblique line. However, because the slope was small and the bearing capacity of the specimen was not significantly different from that of T-shaped steel, the relative height of the compression zone could be simplified as a straight line in the design of the component section. Based on the analysis of finite element model under various working conditions, the paper suggested that the value of load eccentricity about 0.45 should be the preliminary criterion for the size bias in the design of component.