Under the background of new engineering, civil engineering majors have higher and higher requirements on the training objectives of students' application ability, but classroom teaching and practice are contradictory to each other. In recent years, the examination questions of registered geotechnical engineer are more and more close to the engineering practice and it is suitable to be used in the classroom for case teaching. China's registered geotechnical engineer examination is divided into two stages. The first stage is the basic examination, the purpose of the examination is to test whether the examinee has mastered the basic and professional theoretical knowledge. The second stage is a professional examination, the purpose is to test whether the examinee has the ability to carry out the survey, design and construction of geotechnical engineering in accordance with the national laws, regulations and technical specifications and the ability to solve practical problems. Through the calendar year registered geotechnical engineer based test cases and test of soil mechanics, the researches of the registered engineer exam questions do appropriate after deformation is introduced into the case teaching in the class of soil mechanics, can improve students' comprehension of knowledge, image understanding knowledge application in the engineering practice, strengthen the cultivation of application ability, at the same time take registered engineer examination for students after graduation to lay a good theoretical and practical basis.