R Relationship between Language development is one indicator of the overall development of children's cognitive abilities related to success in school later. Emotional intelligence mothers play an important role in understanding, using, and managing their emotions for children's language development at the age of the golden age period. Therefore, I am interested in research and knowing the relationship of maternal emotional intelligence with language development in children aged 12-36 months. This study was an analytical study with a cross sectional design with 98 respondents in the Kelapa Dua Health Center. Data collection uses emotional intelligence questionnaire to examine maternal emotional intelligence and the Denver test. Data analysis was done by univariate and bivariate by Kolmogrov-Smirnof test. The chi-square test showed a significant relationship between maternal emotional intelligence and language development in children aged 12-36 months (p = 0,000). High emotional intelligence mothers have more children with pass language development 52 (67.5%) than mothers who have children with failing language development 16 (20.8%), caution 3 (3.9%), refusal 6 (7 , 8%). Meanwhile, mothers with low emotional intelligence have more children with developing 5 language languages (23.8%), caution 5 (23.8%), refusal 6 (7.8%). compared to mothers who have children with pass 5 language development (23.8%). There is a significant relationship between maternal emotional intelligence and language development in children aged 12-36 months. There is a difference between the average number of values of emotional intelligence and language development.