Abstract: The results of experiment investigation of 24 PVC-CFRP confined reinforced steel tube concrete columns were presented. The influences of hoop spacing of CFRP strips and eccentricity on the failure mode, bearing capacity, strain and load-displacement of PVC-CFRP confined reinforced steel tube concrete column were studied. The experimental results show that small eccentric specimens take the compressive failure of concrete and PVC tube as a sign, while large eccentric specimens take the tensile yield of longitudinal reinforcement and tensile failure of PVC tube as a mark. Compared with PVC confined reinforced steel tube concrete column, the bearing capacity gradually decreases with the increasing hoop spacing of CFRP strips and eccentricity, the ductility coefficient of the small eccentric specimens is improved in different degrees, and the ductility coefficient of the large eccentric specimens remains unchanged. The development of longitudinal reinforcement and concrete strain is basically the same, the strain of CFRP strips in the compression side of the cross section is small, and the strain of the specimen section is basically in accordance with the assumption of plane section. The curves of load-deflection and moment-curvature are divided into two stages. The hoop spacing of CFRP strips and eccentricity have no effect on the first stage. The second stage is the straight line segment, and the slope of the second stage gradually decreases with the increment of the hoop spacing of CFRP strips and eccentricity.