“七七事变”后，北平大学工学院被迫西迁。1937年10月，以北平大学、北平师范大学、北洋工学院等为基干，设立西安临时大学，其中工学院由北洋工学院、北平大学工学院组成，共设包括纺织系在内的6个系。1938年4月，教育部令西安临时大学改名为西北联合大学。7月，西北联大改组为西北大学、西北工学院、西北师范学院和西北医学院。北洋工学院、北平大学工学院、东北大学工学院、河南焦作工学院合并组成西北工学院。自此，工学院在陕西城固古路坝单独设校，开始了一段较为稳定的时期。“西工”纺织系在“平工”机织系基础上建立，主要专业教师队伍仍是“平工”教师。“西工”纺织系又受到北洋治学经验影响，学风濡染，传统交融。在八年抗战中，“西工”纺织系是当时大后方国立大学中惟一的纺织系科，是大后方培育高级纺织工程技术人员的摇篮，为我国纺织工业作出了巨大贡献。
四校合并成立西北工学院批文
艰苦办学
学生越过秦岭
1945年陕西城固古路坝西北工学院后门
国立西北工学院纺织系三十六年班毕业合影
国立西北工学院纺织系三十七班毕业合影
After the Japanese Invasion on July 7, 1937, the Polytechnic School of Peking University had to move to Xi’an. In October 1937, Xi’an Temporary University was founded based on Peking University, Peking Normal University and Peiyang Institute of Technology, etc. and its Polytechnic School combined Peiyang Institute of Technology and Polytechnic School of Peking University, including Textile Department and other 5 departments. In April 1938, the Ministry of Education issued the order to rename Xi’an Temporary University as Northwestern United University. In July, Northwest United University was restructured into Northwest University, Northwest Polytechnic University, Northwest Normal University and Northwest Medical University. Peiyang Institute of Technology, Polytechnic School of Peking University, Polytechnic School of Northeastern University and Henan Jiaozuo Polytechnic School were combined into Northwest Polytechnic University. Since then, the Polytechnic School established its school in Guluba, Chenggu, Shaanxi and started a steady period of teaching. The Textile Department of Northwest Polytechnic School was established based on Department of Weaving, Polytechnic School of Peking University, and most of its teachers were from the Polytechnic School of Peking University. Affected by the academic experience of Peiyang Institute of Technology, The Textile Department of Northwest Polytechnic University inherited its traditional legacy of learning style. During the eight-year Anti-Japanese War, the Textile Department of Northwest Polytechnic University was the only textile department among national universities and a cradle for senior textile technicians at that time, and thereafter it made tremendous contributions to China’s textile industry.