The major of Civil Engineering (Structural Engineering) requires graduates to have adequate knowledge concerning structural design and engineering practice. For double-degree education, the existing problems, including excessive teaching tasks to be completed within limited time, present great challenges for minor course lecturers. An academic investigation on the difficulties encountered in minor course teaching has been conducted and solutions are proposed. During the investigation, the Concrete Structures course, which values both mechanic theory and engineering practice, was taken as an example. It is shown that the theoretical foundation of students taking minor courses are weak, the teaching time for students from different majors is difficult to arrange, prolonged class may lead to fatigue of teachers and students, and it is difficult for students to catch up if they fail in the exam. Therefore, lecturers should pay attention to the vividness and retrospectivity of the theoretical knowledge teaching, which can be realized through experiments, animation videos and online courses. Moreover, the cultivation of engineering practice ability should also be highlighted for double-degree students. The teaching time for theoretical knowledge and engineering practice should be reasonably planned. Case study of renowned buildings and notorious structural failures can be carried out to develop the engineering problem-solving ability and professional responsibility of students.