Pipeline collision technology of BIM can effectively simulate the collision problem of HVAC pipes,electrical pipelines,water supply and drainage pipelines in complex construction projects. However,this technique cannot give an optimized solution according to the location of the pipeline collision currently. Motivated by this,BIM pipeline collision optimization model is established based on the intuitionistic fuzzy analytic hierarchy process (IFAHP). Firstly,a pipeline collision evaluation index system is given by construction costs,construction difficulty,construction safety,and construction aesthetics in accordance with construction pipeline construction specifications. Secondly,different intuitionistic fuzzy judgment matrixes are given according to IFAHP and the position of the collision point,corresponding intuitionistic fuzzy decision optimization models are established,and then the pipeline optimization solution for different pipeline collision points is given. Finally,the effectiveness and feasibility of the BIM pipeline collision optimization model are verified by an example.