According to the characteristic of soil mechanics,excessive theories,across-subjects,and immature and incomplete, soil mechanics is based on much more classical but inconsistent theories. With the authors’ teaching experiences, the paper analyzed some relationships in the teaching of soil mechanics including theory and practice, reductionism and system theory, soil mechanics course and other courses, knowledge in textbooks and innovation ability training, teaching content and latest scientific achievements, students and teachers, teaching content updating, teaching process and teaching result.