At present, in the process of tractor design, due to the lack of means of automatic information exchange among most design departments, the design efficiency is low and it is difficult to meet the real-time requirements of current design and manufacturing information. In order to solve this problem, many design enterprises have introduced the cloud design service platform. However, in the process of information exchange and sharing, the separation of data owners and managers can cause data security and infringement of intellectual property. In order to protect the privacy of drawings and images in the process of digital design of tractors, a data privacy protection method based on image degeneration and restoration and data separation storage and sharing is proposed. In addition to the important information degradation of the image of the work produced during the digital design of the tractor, this method uses a separate form of data storage and transmission to separate the data into multiple parts, and no single unit can obtain complete information Of the information, to achieve the double encryption of data, the encrypted information more secure and reliable. The data security and privacy protection technologies of cloud storage service are validated. The results show that with the continuous expansion of data size, communication costs have not changed much, and the data security is high, which meets the requirements of data security and privacy protection demand.