Double-E design is the basic principle for eco-design of plastic products, which centers on easy-to-collect & easy-to-regenerate. The concept of Double-E design originates from the 3R (Reduce, Reuse and Recycle) principle of circular economy. Core problems in plastics recycling include difficulty in recycling, high recycling cost, and low regeneration value. The Double-E design system is a set of green design system based on the pain points of the industry, the application field of plastic products, and the latest progress in technology. We put forward the new 3A concept (Available, Acceptable, Affordable), which means that the green innovation technology and business model of plastics industrial chain are Available; the social, environmental and economic impacts of plastic products in the process of production, consumption and waste disposal are Acceptable; and the cost increase brought by the implementation of eco-design and green transformation of industrial chain is Affordable. Being easy-to-collect and easy-to-regenerate is the basic guarantee to realize the recycling and sustainable value of waste plastics