This paper briefly introduces Dongguan Hongfulu Large Bridge and its main structure, analyzes several key control points in design and construction, and puts forward an accurate control method for one-time lifting elevation of flexible bridge deck system, namely "pitch control method ", emphasizing that bridge design must be closely combined with construction, so as to facilitate the exchange of experience and push of bridge engineering design and actual construction with peers in the bridge field Broaden the new bridge structure and improve the bridge design level.