Agile Software Development (ASD) is an adaptive software development approach that easily adapts to changing software requirements. It offers an advantage in time management but has disadvantages such as lack of software documentation and knowledge management. This research aims to understand more about research development in the knowledge management improvisation in Agile Software Development by collecting various themes of improved area and method used. To achieve this goal, 226 articles written in 2009-2018 are screened by using Kitchenham method to produce 15 best articles. This systematic literature review (SLR) results in a summary of improvements in knowledge management. The summary includes various approaches of several themes such as documentation, tools or technology, and others. The areas that need improvement are tools for supporting communication and documentation. The suggested improvement that has been proposed by researcher focuses mostly on artifact documentation, decision making, effort estimation and tools. In these studies, research question can be identified, analyzed, and answered.