The invention provides a BIM-based dam project construction scheme integrated optimization method. The method comprises the steps that S1, a dam general project structure is established, dam main structure parameters are acquired, and an initial dam project digital model is established; S2, data partitioning is performed on stock ground raw materials used in a dam project; S3, data collection is performed on construction traffic planning of the dam project, and the quantity of vehicles, transportation capability and material transportation time are configured according to collected data; S4, parameter setting operation is performed on block stone according to the construction state of the dam project; S5, a dam face volume and stone block data are subjected to operation, and a constructionperiod of dam face stone filling is obtained; and S6, filling of gravel earth core wall materials of the dam project is performed, simulating computation is performed through all construction procedures, construction process information containing a dam body filling progress plan, resource consumption conditions and a traffic flow state is obtained, and the construction process corresponding to adesigned construction scheme is carried out more abundantly and more accurately.