This study mainly investigates college students’ online English learning engagement, and explores the dimensions and internal relationships of online English learning engagement among students based on Super Star learning platform. The research focuses on 270 English major college students and explores the level and underlying mechanisms of English online learning engagement from three dimensions, which are cognitive engagement, emotional engagement, and behavioral engagement. It has been found that emotional engagement and cognitive engagement have a direct and significant positive impact on behavioral investment; Emotional engagement has a significant positive predictive effect on cognitive engagement. The research results contribute to understanding the mechanism of the intrinsic structure of engagement in English online learning and provide reference for improving related teaching.