With the deepening of educational informatization, online learning methods are rapidly emerging and gradually applied in the field of higher education. Although online learning has practical advantages such as convenience, interactivity and timeliness, it also has some shortcomings such as separation of teachers and students and lagging teaching supervision and management. In this regard, based on the current teaching situation of English majors in colleges and universities, this paper will build an online learning behavior index system and analysis framework, summarize the characteristics of students' behavior, and put forward suggestions for improvement on the subsequent curriculum teaching plan. The analysis framework takes data mining technology as the core, and focuses on using Pearson coefficient to calculate the correlation between learning behavior and English learning performance. At the same time, it combines Logistic regression model to classify and predict students' learning performance, which is convenient for teachers to analyze and deal with students' learning behavior and improve the effectiveness of online learning. Practice has proved that students' operational behavior, cooperative behavior and problem-solving behavior are significantly correlated with their English performance, and learning intervals, communication times and the completion of learning processes are the main learning behavior characteristics that affect their English performance. Teachers need to take corresponding measures to intervene and provide students with necessary guidance and help.