Under normal circumstances, you can't get the graduation certificate if you don't pass the undergraduate thesis. Because the undergraduate thesis is a part of the dissertation, and the dissertation is one of the necessary conditions for obtaining a degree. If the undergraduate thesis fails, it will not meet the requirements of the dissertation, nor will it be possible to obtain a degree.

However, the regulations of different schools and majors may be slightly different. I suggest you check the specific regulations of your school and major to understand the relevant requirements. If your undergraduate thesis fails, you can ask your tutor or the Academic Affairs Office if there is any chance to retake or retake the exam, so as to finish your studies and get your degree as soon as possible.