E-learning refers to a technology-based learning system that allows it to be accessed anytime and anywhere. The application of e-learning in the world of education today is very much needed. The Covid-19 pandemic has encouraged to be used as a backup and solution in the learning system. Currently, knowledge management has been widely applied to digital-based learning. In its application, it is necessary to know what methods and models are applied to support the successful implementation of e-learning. It is hoped that this research will find out the knowledge management model for e-learning suitable for educational institutions. This study aims to find out the models and impact that arise in applying knowledge management in e-learning. This research was conducted using a systematic literature review method that took references from ACM, IEEE, ProQuest, ScienceDirect, and Scopus from 2017-2021 with the final paper extracted as many as 16 articles. In using KM to e-learning, using quantitative methods is more widely used. The SECI model can be a solution as a material for analyzing existing KM processes. Several other models can be applied according to the needs and objectives of KM implementation on e-learning. The application results show positive impacts, including improving better perception, user satisfaction, and improving existing knowledge processing. The implementation of KM in e-learning is also one of the success factors needed.