This research study aimed to explore the effect of secondary school teachers' emotional intelligence on school climate and to calculate the effect among each component of teachers' emotional intelligence on components of school climate. This study was quantitative in nature using a causal-comparative design. The population of study was based in female teachers at public secondary schools of Lahore. A total of 120 female teachers from 30 schools had participated in study. The researcher had used simple and multiple linear regression and two questionnaires to investigate the cause and effect among teachers' emotional intelligence and school climate. One questionnaire was adapted i.e., Social Emotional Teacher Rating Scale (SETRC) and the second was developed by the researcher herself on school climate in the light of literature. The descriptive statistical techniques were used for data analysis such as mean, standard deviation and Inferential statistics correlation, simple linear regression and Cronbach alpha. The results depicted strong &significant effect of teachers' emotional intelligence on school climate with some exceptions. The modern education systems are changing rapidly and it is need of hour to shift the paradigm from traditional approach for teaching towards high emotional intelligence skilled teaching approach. This study will broaden the literature and knowledge on these emerging constructs: teachers' emotional intelligence and school climate. Further, the study will be helpful for the educational administrators to understand the importance of high emotional intelligence in teachers and it's significant role to improve the school climate.