In practical,arch bridge,as a major stress plane curving pole system,would be eccentrically pressured by engineering materials,construction process and other reasons.Based on the nonlinear properties,the linear and nonlinear stability analysis,we obtained the various modes of the stability safety coefficient.From the analysis of results,we choose a tension scheme.Taking two nonlinear reasons into account,the stable safety coefficient would be reduced largely,so that the nonlinear effect must be considered in the stability analysis of construction.