In our rapidly evolving world, propelled by technological advancements and societal progress, the pace of life has accelerated significantly. However, this relentless pursuit of speed has also given birth to pressing ecological challenges, with waste accumulation being a conspicuous concern. Despite concerted efforts to promote waste classification practices through policies and initiatives, the adoption of such behavior remains disappointingly limited. Consequently, the exploration of waste classification behavior has garnered attention in the field of environmental psychology. This paper synthesizes years of domestic and international research to comprehensively review the current state, definition, influencing factors, and potential benefits of waste classification behavior. By adopting a multidimensional approach, it aims to unveil the role of psychology in shaping such behavior, while also addressing the persisting ecological dilemmas that continue to confound contemporary efforts.