QFDE is a highly executable green design approach with reasonable procedures. Due to the lack of scientific environmental impact evaluation index and qualitative weight distribution, it is difficult to achieve the improvement in products and ecological characteristics of production processes. Improvement in QFDE was made by using LCA which laid emphasis on environmental impact evaluation. The deficiency in environmental impact evaluation was compensated and it has become the ecological design method in accordance with EuP eco design and with optimized product ecological environment characteristics. After introducing QFDE concept, based on its process and shortcomings, with the detailed analysis of LCA environmental impact assessment, the approach, procedure and measures were discussed with the application in food and packaging machinery by using QFDE improved from the LCA method.