Based on Bloom's Taxonomy of Educational Objectives, this paper tries to compare and analyze the teaching effects of blended teaching mode and the traditional offline teaching mode in business English course.Based on the test results and interviews, the study shows that: 1) blended teaching mode can significantly improve students' learning performance; 2)blended teaching mode could enhance students' learning initiative and enthusiasm by reconstructing the traditional classroom teaching.Therefore, teachers should focus on using a combination of online and offline teaching modes to cultivate students' independent learning ability, inspire their interest in learning and achieve better teaching effects.