The GPA will not get higher after the second interview. There are still grade points after the college re-examination. Most schools use make-up exam results, no matter how many, they can only record 60 points. The grade point is the passing grade point, that is, according to the D grade, that is, the final grade point is 1.0. Expanding the data grade point system is one of the important supporting measures to implement the credit system. Since 1985 China began to advocate the implementation of the credit system, there have been many discussions and studies on the credit system, but few discussions on the grade point system have affected the smooth implementation of the credit system. This paper analyzes and studies many problems existing in the process of adopting the GPA system in domestic universities, and puts forward corresponding problems on the basis of comparing with the GPA system implemented in American universities.