Emotional intelligence (EI) plays a critical role in English learning, as it fosters a better understanding of language nuances, enhances learner motivation, and improves communication skills, thereby leading to a more effective and enriching learning experience. However, the impact of EI on English language acquisition among Vietnamese learners remains underexplored creating a gap in educational studies. This study aimed to investigate the Vietnamese students' perspectives of the impacts of EI on their second language acquisition (SLA). A mixed-methods approach was employed combining quantitative data collected through a questionnaire and qualitative data obtained from semi-structured interviews. The study involved 105 English-major students selected through convenience sampling. The findings revealed a positive correlation between EI and SLA, with characteristics such as motivation, self-confidence, interpersonal skills, a goal-oriented mindset, and emotional openness significantly impacting language learning outcomes. These findings have implications for language learning theory, pedagogy, and curriculum development, emphasizing the need to address learners' emotional well-being and incorporate EI skills within language learning contexts. By integrating these elements, educators can create a conducive learning environment that enhances both linguistic and emotional competencies.