To accurately calculate the local deformation of corrugated steel web in asynchronous suspension construction, the plate and shell element model was established by finite element software Midas/FEA to study the local deformation of corrugated steel web under load. The error variation between the calculated value and the measured value was analyzed. The results show that the local deformation of corrugated steel web in asynchronous construction mainly comes from the influence of load. According to the law of error change, the deflection relation is fitted out, and the local deformation value of corrugated steel web in construction is corrected to ensure that the bridge alignment meets the design requirements.