This paper aims at the problems of low efficiency and poor quality of college students' online courses, and makes a questionnaire survey on the influencing factors of college students' online course learning quality. According to the survey results, the factors that affect the learning quality of college students' online courses are divided into four dimensions: platform design dimension, curriculum design dimension, students' self-management dimension and hardware support dimension. Through the analysis of the survey data, we can understand the present situation of college students' fragmented learning and get the factors that affect the quality of college students' fragmented learning, and finally put forward relevant strategies to improve the learning quality of college students' online courses.