产品及其零部件的再使用是我国废旧电器电子产品回收处理体系中易被忽视的关键过程。将合理的再使用与环境友好的材料回收再生过程相结合，才能实现废旧电器电子产品回收处理的生态效率最大化与可持续发展。因此，本研究拟采用物质流分析、生命周期评价、系统动力学等系统分析方法，辨识典型废旧电器电子产品及其关键零部件的再使用物质流现状，揭示再使用策略的微观与宏观尺度的主导因子与影响机制，建立废旧电器电子产品及其零部件最佳使用寿命的评估模型及产品生命终期策略决策方法，探讨基于生产者责任延伸原则的回收处理体系下的再使用管理对策优化方法，为我国废旧电器电子产品管理政策的全面落实和适度改进具提供有价值的理论依据与科学基础。

Reuse is the key strategy of China Waste Electric and Electronic Equipments end-of-life system. Combinined with materials recycling, reuse of products and components will help realize eco-efficient and sustainable WEEE recovery system. Employing systematic analysis methods including Substance Flow Analysis (SFA), Life Cycle Assessment (LCA), and System Dynamics (SD), ect., this study will identify current practices and future trends of Reuse in China WEEE recovery system and discover the effect mechanism of reuse on both macroscale and microscale. Methods to estimate the most optimal use lifespan and to evaluate the optimal End-of-Life strategies will be built, and the promotion strategy of reuse will be developed in the WEEE recovery system based on the Extended Producer Responsibility principles. This study will provide key theory and scientific data for sustainable management of reuse.