This study discusses the social media branding of Pertamina’s corporate social responsibility program in environmental field through Energi Hayati account which conducted by a digital agency, Rwe Bhinda. The purpose of this research is to find out how communication strategy used by Rwe Bhinda in managing social media account of Energi Hayati to build a branding of Pertamina’s corporate social responsibility program in environmental field through social media. The type of this research is qualitative research with descriptive approach. Data collection procces by using interview method and collecting document. The subject of this research is Rwe Bhinda's strategic team who manages the account of Energi Hayati. The author uses triangulation technique of data source to test the validity the data that has been obtained. The results of this study indicate that the social media branding of Energi Hayati’s account aims to build brand awareness, brand engagement, and brand loyalty of Pertamina’s corporate social responsibility program in environmental field. Then Rwe Bhinda's communication strategy in managing the Energi Hayati’s account is divided into several stages namely, determining the purpose of communication, segmenting the audience, selecting the media, preparing and setting the method of delivering messages, making purchases of ads, organizing digital activation, using buzzer or influencer, replying the audience review (role of communicator), and also do evaluation and monitoring.