In this article, flood control influence overall evaluation is carried out after flood and river regime is analyzed through flood control evaluation calculation for the bridge crossed Cihe River located on the Expressway from Xibaipo to Fuping (hereinafter referred to as Expressway Xi-Fu). It is demonstrated that no influence can be found for construction of bridge on flood control of the riverway. Result of research shows flood passage is safe, for that the span and the clearance height of bridge etc. can meet the standard and provision after designing the flood standarda on once meeting during 300 years of Zhangjiazhuang special-lang brige.