With the rapid development of information technology, 5G technology, as a representative of the new generation of communication technology, is gradually demonstrating its enormous potential and application value in various fields. In electronic information engineering, optimizing information transmission has always been an important research topic. Starting from an overview of 5G technology, this paper aims to explore the importance of optimizing information transmission in electronic information engineering through 5G technology. By analyzing the information transmission optimization of 5G technology in electronic information engineering, it is hoped to provide theoretical guidance and technical support for practical applications in related fields.