With the continuous application of BIM technology in bridge engineering, the problem of BIM model construction in bridge design has gradually become prominent, and the phenomenon of "remolding" is serious, which restricts the improvement of bridge design level. To solve this problem, the BIM forward design concept is put forward. For this end, based on the BIM technology and related concepts of forward design, this paper summarizes the causes of "remolding" phenomenon, and determines the forward design concept of BIM technology． Through the establishment of 3D model, model calculation analysis, drawing output, virtual splicing, engineering quantity statistics, collision inspection and bridge visualization technology disclosure, it studies the application method of BIM technology for BIM forward design, and provides experience reference for bridge BIM forward design.