In recent years, with implementation of the policy of combined enrollment of students for second and third-level four-year colleges, the second-level university students' performance in advanced mathematics has declined significantly. In this paper, some students in Sichuan Tourism University are sampled for their college entrance math exam scores, their gender, their source places and their high school academic disciplines, and the statistics software SPSS21 is used to analyze the factors affecting the freshmen's advanced mathematics exam scores in this previously second-level four-year college. Our results show that the correlation coefficient between students' math scores in college entrance exams and their exam scores in advanced mathematics is only 0.164, that is, students' college entrance math scores have no decisive effect on their advanced mathematics exam scores, and their liberal arts or science disciplines do not have a significant impact on their advanced mathematics exam scores either, whereas their source places and genders do have a significant impact.