Abstract: Based on analysis of the using of blackboard-using and PPT in present college professional courses teaching, the paper takes soil and water conservation engineeringcourse as an example, through comparison of exam results of 221 college students in seven years, it finds that the flexible using both PPT and blackboard-using teaching can cultivate students' interests to help them improve their achievements in learning, and compared with excessive reliance PPT teaching, both blackboard-using and PPT teaching can improve students' achievements, significantly. On this basis, the study suggests that PPT courseware should not be excessively dependent, and the advantage of two teaching methods should be gived fully play, so as to inspire students' interests and initiative to improve teaching effectiveness.