In order to enhance the mechanical properties of 3D printed concrete arc arch structure, this paper uses the methods of adding steel fiber and configuring steel reinforcement to investigate the effect of circumferential reinforcement on the mechanical properties of 3D printed steel fiber concrete arch structure. The appropriate steel fiber content was determined by mechanical properties tests under different steel fiber content. On this basis, two groups of 3D printed concrete arc arch structures were designed. By applying uniform load to the arch roof, load-displacement curve, strain change with load, cracking load and ultimate load of the arch structure were measured, and their deformation and failure laws were analyzed. Considering the influence of symmetric and asymmetric loading and the position of sectional reinforcement on the arch structure, the finite element calculation is carried out to further study its bearing performance. The results show that: (1) When the steel fiber content changes in the range of 0-3%, the compressive strength of 3D printed concrete in X, Y and Z directions increases first and then decreases, and the compressive strength in X, Y and Z directions corresponding to 2% steel fiber content is the highest; (2) The loading failure process of the two groups of arch structures is basically the same, and the ultimate bearing capacity of the arch structure under the circumferential reinforcement is about 37.5% higher than that of the plain concrete arch structure; (3) The finite element modeling method adopted is more accurate, and the error between the simulation results and the test results is less than 4%. The loading method and the position of section reinforcement have certain effects on the ultimate bearing capacity of the arch structure.