Engineering construction simulation method and system based on BIM

The invention discloses a BIM-based engineering construction simulation method and system, and relates to the technical field of data processing, and the method comprises the steps: carrying out the hierarchical disassembly and attribute classification of construction drawing information of a target project, obtaining the attribute feature data information of engineering construction, carrying out the drawing modeling, and creating a BIM model of the target project; performing simulation parameter analysis on the engineering construction element information, and performing analogue simulation on the target engineering BIM model based on the analyzed engineering construction simulation parameter information to obtain a construction analogue simulation interaction data stream; and the construction simulation interaction data flow is analyzed based on the construction simulation function analysis network, construction feasibility effect information is output for construction parameter optimization, and construct