Northwestern Polytechnical University, formerly known as Northwest Institute of Technology, is located in Xi 'an, the ancient capital. 10, 1957, 10 merged with Xi 'an Aviation College to form Northwestern Polytechnical University. 1February, 1970, the Department of Aeronautical Engineering of Harbin Institute of Technology was integrated, and there were two campuses, Friendship and Chang 'an.

"Xigong University" water library was rated as "the most beautiful university library". In this university campus in the northwest, there is actually the largest water library in Asia. The library of Chang 'an Campus is built on Qizhen Lake and Qixiang Lake, which is a landmark building of the whole campus and a highlight of the campus of Polytechnic University. The library of Chang 'an Campus draws design inspiration from the word "line", just like a soaring sail, creating an architectural form with high spirits and an eagle striking the sky. The library covers an area of 32,000 square meters, with 6,543,800 books and 4,000 reading seats. The facilities are complete, and some students rated it as "like a five-star hotel".