The invention discloses a BIM-based concrete fabricated building construction method, comprising the following steps: creating a building full-professional integral BIM model, optimizing integral design, splitting prefabricated parts, deepening prefabricated part nodes, performing construction simulation optimization design, performing engineering quantity statistics, drawing a prefabricated partprocessing drawing, and manufacturing a prefabricated part two-dimensional code. By creating the visual informationized BIM model, the BIM-based concrete fabricated building construction method improves the collaborative design of information of the building, the structure and the electromechanical specialty, avoids the problems of mistakes, omissions, collisions and lacks of the design specialties, and improves the design quality. Meanwhile, the assembly type construction process is visually simulated through BIM, and the problem optimization design in construction is found in time, and the design and construction barrier is broken through. Besides, the BIM technology can perform rapid drawing according to the model, and the design quality is improved through automatic statistics of the engineering quantity, and visual construction simulation can further guide field construction, and the generated two-dimensional code can be used for information tracing of the prefabricated part, andthe overall construction quality of the prefabricated building is improved.