With the development of education internationalization, many universities in China carry out the bilingual teaching experimental work, teaching through the combination of English and Chinese. However, how about the teaching effects for the different courses after using the bilingual teaching method namely the evaluation of teaching effect is worth to consider. After the practice of bilingual teaching for structural mechanics course for several years, the paper summarized the experiment plan, the experiment phenomenon and the experiment results, then established the evaluation system of the teaching effects providing some references to the bilingual teaching for other engineering courses.