BIM (Building Information Modeling) data robust watermarking method and device and medium

The invention belongs to the technical field of watermark information security, and particularly discloses a BIM (Building Information Modeling) data robust watermarking method, a BIM data robust watermarking device and a medium, the method comprises the following steps: firstly, calculating a central point of a primitive bounding box to realize primitive positioning, constructing a primitive coordinate and watermark bit synchronization relationship based on a mapping thought, and secondly, classifying primitives after mobility test to obtain a BIM data robust watermarking result; and performing spatial position disturbance on the movable primitives, performing attribute field invisible character embedding on the immovable primitives, and finally obtaining BIM data containing watermark information. Experimental results show that the method is high in security, has strong robustness to geometric attacks, can resist common digital-analog separation attacks in BIM + GIS scenes, can meet actual use requirements,