By 1948, Xiamen University had developed into five colleges and 18 departments, with liberal arts departments (China Literature Department, Foreign Languages Department, History Department and Education Department), science departments (Mathematics Department, Chemistry Department, Biology Department and Ocean Department) and engineering departments (Civil Engineering Department, department of mechanical engineering, Electrical Engineering Department and Aviation Engineering Department).
Law schools (law departments, political departments and economics departments) and business schools (banking departments, accounting departments and international trade departments) also have research institutes (rooms) such as oceanography research institute, economic research institute, history research institute and psychological laboratory. ?
On June 1946 and June 1 day, the headquarters of Xiamen University began to move back to Xiamen. People from all walks of life in Changting held a farewell meeting in the gymnasium and presented large plaques engraved with the words "Nanqiang". During the demobilization in Xiamen, the school adjusted its departments and disciplines, and the Institute of Technology was divided into the School of Science and the School of Engineering, except for the establishment of the first oceanography department in China 1946 in July.
The department of mechanical and electrical engineering is also divided into mechanical and electrical departments; The business school has added the department of international trade; Add a judicial section to the legal department; The number of students has increased to 1600.