The building electrical is recognized as one of the important vocational courses for students of the newly adapted building environment and energy engineering specialty. For the requirements of the comprehensive talent training and the major connotation construction, the new teaching system of the building electrical course is constructed in accordance with the principle of the overall optimization, step by step and teaching students in accordance with their aptitude. The teaching reform of classroom teaching, practice teaching and course design are mainly discussed. Some concrete practices are presented in this paper.