The present application provides a method, device, equipment and medium for generating a dam BIM model, which relates to the technical field of dam BIM models, and includes: receiving a segmentation command for the dam BIM model, constructing N first segmentation planes based on the segmentation command, segmenting the dam BIM model in multiple batches to obtain N+1 dam section models; for the N+1 dam section models, setting a dam section number, the number of construction unit models, and the start and end elevations of the multiple construction unit models corresponding to each dam section model; for the N+1 dam section models, segmenting the target dam section model according to the dam section number and the number of construction unit models corresponding to the target dam section model to be segmented as needed, and the start and end elevations of the multiple construction unit models corresponding to the target dam section model, to obtain the segmented dam BIM model.