The present study centers on the utilization and advancement of "human-computer interaction" (HCI) within the realm of online education. This is achieved by providing a succinct overview of the human-computer interaction mode and the evolution of human-computer interaction technology. Based on the findings of the analysis, it is projected that the global digital music industry will experience a decline in total revenue during the period spanning from 2010 to 2020, followed by a subsequent increase. Specifically, it is anticipated that the total revenue of the global digital music industry will reach a value of US$21.5 billion in 2020, reflecting a year-on-year increase of 7.7%. The discourse pertains to the significance of the Human-Computer Interaction (HCI) model in the domain of music education. A novel collection of human-computer interaction (HCI) online music applications is suggested, and an assessment of current HCI online music instructional software is conducted. Subsequently, an examination of 'Little Leaf Music Education' is conducted utilizing Human-Computer Interaction (HCI) as a point of entry. The development of a Human-Computer Interaction (HCI) course rating scale was undertaken utilizing a participatory action research methodology. The study was conducted using a survey methodology, and it was found that 66.67% of the 12 participants who were surveyed had attended the sessions. The attendance rate of the four students who were not fully enrolled was equal to or greater than 60%. This indicates that the students did not exhibit resistance towards the HCI tool 'Little Leaf Music Education'. Further investigation into extracurricular employment demonstrated that the proportion of pupils who submitted their work offline under the HCI framework was as high as 90%. The pass rates for the assignment were recorded to be as high as 90%. Subsequently, a simulated assessment revealed that 75% of the students performed proficiently on the examinations. Furthermore, the surveys conducted on HCI classroom satisfaction and teacher satisfaction revealed that the collective satisfaction rate for both categories was 100%.The Human-Computer Interaction (HCI) model has expanded the potential for interactive music instruction and has successfully directed the advancement of students' imaginative and innovative abilities. This finding offers robust empirical evidence to inform and direct the future implementation and advancement of Human-Computer Interaction (HCI) in the context of online education.