Fei Shuiya Bridge is a half-through steel-pipe concrete arch bridge with uniform catenary. Based on sufficiently considering the principle of symmetrically loading rib concrete, the pouring process of concrete is calculated through MIDAS/Civil 6.71. Structural distortion, bearing-force characteristics and stabilization coefficient of each phase are given. Structural security is discussed too. Conclusions have a certain reference value for the same bridge in pouring the rib concrete.