There is a growing interest in the quality of life and cognitive emotion regulation of deaf and hard-of-hearing (DHH) adolescents. Hence, the present study examined the effects of emotional intelligence training on quality of life and cognitive emotion regulation of DHH adolescents. The participants were 36 female DHH adolescents aged 16-20 years who were selected by a cluster random sampling method. Initially, two schools were randomly selected from DHH schools in Tehran, Iran. Subjects were selected from these schools and randomly assigned to experimental (n=18) and control (n=18) groups. The experimental group participated in emotional intelligence training programme for 12 sessions. The intervention was implemented for 45 min a day over six weeks. All participants completed the Youth Quality of Life Instrument--Deaf and Hard of Hearing Module (YQOL-DHH) and the Cognitive Emotion Regulation Questionnaire (CERQ-short). Data were analysed by Multivariate Analysis of Covariance (MANCOVA). The results indicated that emotional intelligence intervention significantly influenced the quality of life and cognitive emotion regulation in DHH adolescents. The findings of this research suggest that emotional intelligence training might result in effective and positive outcomes and might play a critical role in the quality of life and emotions regulation of DHH adolescents.