In order to study the compression behaviour of concrete columns reinforced with steel-FRP composite bar (SFCB), three groups (group one uses steel bars, group two uses BFRP bars and group three uses SFCB) of reinforced concrete columns were made and tested. The effects of the eccentricity and reinforcement type on the bearing capacity, deflection, crack and failure mode were analyzed. The results show that the larger the eccentricity, the larger the deformation at the middle of the SFCB concrete column, the larger the crack width and the lower the ultimate bearing capacity. Among the three types of reinforced concrete columns, for axial compression, the BFRP reinforced concrete columns show the highest bearing capacity, but for eccentric compression, the reinforced concrete column exhibits the highest bearing capacity. The maximum deflection of SFCB concrete column deflection is 3% larger than that of reinforced concrete column, but 24% smaller than that of BFRP reinforced concrete column.