<p>Leachate poses a significant environmental challenge globally. Controlling and reducing its environmental and health impacts should be recognized as a universal priority. This study aims to evaluate the feasibility of using and introducing cold or non-thermal plasma for treatment and to provide a six-step guideline for researchers. It assesses scientific resources on plasma technology by examining publications up to 2024 and then analyzes the resources to create a detailed database of reactor specifications and plasma system information, including design, operational, and electrical parameters. The first three steps of the study examine and categorize the leachate production process, its characteristics, conventional treatment methods, and the key indicators for selecting appropriate treatment approaches. In the fourth step, the study proposes four positions for using this technology in leachate treatment: an independent unit, a complementary treatment unit, a pre-treatment unit, and a combined unit and considering single, array, and hybrid for these reactors and their interaction with the liquid environment in three modes: direct, indirect, and concurrent interaction. The fifth step identifies eight essential characteristics for classifying and introducing plasma reactors, including the type of plasma technology, reaction phase, operating pressure, discharge regime, reactor structure, gas type, power supply, and combined system with the plasma reactor. Finally, the sixth step evaluates various methods for purifying plasma systems and determines the parameters influencing the performance of these reactors in three categories: design, electrical, and operational. This analysis positions cold plasma technology as a promising and innovative solution for treating landfill leachate and other types of wastewater, highlighting its capabilities.</p>