Abstract: In order to solve the problem of lack of appropriate innovative design methods in low-carbon design of mechanical products, a low-carbon innovative design process of mechanical products based on resource expansion, which integrates TRIZ resource analysis and extension innovation method, is proposed. Firstly, the model of incompatibility problem is established for mechanical products with low carbon demand, and then the available resources are listed by resource analysis of the existing conditions of the product, and the available resources are described by the primitive model. Then, the multi-screen method is used to expand the resources of resource primitives to get the innovation path, and then the extension transformation is carried out on a number of innovation path to get product ideas. Finally, the superiority evaluation method is used to evaluate these product ideas and select the best idea, and the specific design scheme of the idea is obtained. Taking the traction household elevator as an example, the low-carbon innovative design process of mechanical products is applied to design a low-carbon rigid chain push-pull household elevator, which proves the feasibility of the design process.