Abstract: Based on the structural analyse of the steel ball rollers of skew rolling, the profile data of parts such as type, basic figure, manufacturing feature and size was extracted from the 3-dimention model in the ARX exploiting circumstance using MCAD API, the developing tools of MDT. The manufacturing feature data was extracted according to the corresponding 2-dimention drawings. At last, parts information was put in order and recognized automatically on the basis of the relations between the model and drawings. A extracting information system for the rollers was developed, directly from the CAD system then turned it into the CAPP system in the CAD/CAPP/CAM integrated circumstance. The method can be used in extracting the information of general rolling parts also.