Abstract:Lean is the cornerstone of intelligent manufacturing and the ideological foundation of the digital transformation of traditional manufacturing industry. Lean digital level is directly related to the success or failure of the traditional manufacturing industry to intelligent manufacturing. Based on this, the article based on intelligent manufacturing background, on the basis of existing research, this paper constructs a lean digital level evaluation index system composed of eight subsystems which includes digital infrastructure construction, digital personnel quality training, system construction, digital information utilization, logistics and supply chain intelligent integration, digital production improvement, digital products and green production. A lean digital level assessment model is constructed by using fuzzy set pair analysis method, and a case study which a traditional manufacturing enterprise that is transforming to intelligent manufacturing. The results show that the established index system and evaluation model are scientific and can provide a basis for the traditional manufacturing industry to scientifically measure its lean digitization level and improve its management.