Environmental problems are becoming more severe due to firms' operational activities, such as industrial production and manufacturing, which damage the environment. Consequently, Green Innovation (GI) is necessary to mitigate these negative effects. Although studies indicate that Knowledge Management (KM) impacts companies with GI, the specific impacts and mediating roles remain unclear. This study aimed to identify factors affecting KM in companies with GI and to understand how KM influences these companies. Using Kitchenham's systematic literature review of 20 articles from the past five years, this study found that green entrepreneurial orientation, green transformational leadership, knowledge-oriented leadership, embeddedness, stakeholder pressure, big data analytics capabilities, and training influence KM in companies with GI. Additionally, KM affects companies with GI directly and indirectly through human capital, sustainable development practices, environmental awareness, and green creativity. A conceptual model was proposed to illustrate these relationships, providing insights and recommendations for optimizing KM implementation in GI settings.