Many Small and Medium Enterprises (SMEs) in the food processing sector generate waste and exhaust emissions from food residue burning, and consume excessive electrical energy during cooking, leading to environmental pollution and damage. This study proposes the application of Green Human Resource Management (GHRM) practices (e.g., selection, training, performance management, and compensation) and Organizational Citizenship Behavior towards the Environment (OCBE) to improve the Environmental Performance (EP) of food processing SMEs, with the implementation of Islamic Work Ethics (IWE) as a driving factor. Utilizing a purposive sampling method, a total of 500 owners of food processing SMEs in West Sumatra, Indonesia were selected as research samples. The data were analyzed using Partial Least Squares Structural Equation Modeling. The study's findings demonstrate that OCBE fully mediates the relationship between IWE and EP. These insights are crucial for helping food processing SMEs to enhance their environmental protection efforts.