Abstract: In order to solve the problem of data connection between the geological survey major and the structural design major in the 3D design scenario, based on the Revit secondary development technology, this paper takes the 3D stratum model exported by ItasCAD as an example to introduce the method of reading the stratum information. This method can obtain the stratigraphic distribution in the survey area and correlate the stratigraphic attribute information,and realize the query function of the stratigraphic distribution in the whole range of the station area. This method can improve the efficiency of the design professional to query geological information.