Abstract: In order to match the needs of the following curriculums in the specialty of navigation engineering and the current developments of navigation technologies, the teaching reform has been implemented on optimum estimation course arming at the integration of theory and practice. This paper introduces the requirements of navigation engineering specialty for optimum estimation course. Then the teaching idea of this course is analyzed. The reforming implementations, such as the course content modification, textbook improvement, teaching methods and means are discussed. Finally, the current problems are considered and the improvement plans are proposed.