The purpose of this thesis is to design and optimize the shared data privacy protection scheme based on multi-party security computing. Data privacy protection is facing great challenges in the information age, especially in the context of data sharing. As an advanced technology, multi-party secure computing provides a new way to solve the problem of data privacy. By analyzing the principles and methods of multiparty security computing, this paper proposes an efficient data privacy protection scheme, and verifies its effectiveness through data experiments. The research results show that the scheme can realize efficient data sharing while protecting data privacy, providing a strong guarantee for data security.