The canal route and cascade scheme are major technical schemes for a canal project,and it is necessary to make multi-factor comparison and selection,dimensional demonstration,and multi-objective decision-making research.In view of Pinglu Canal channel route and cascade layout quantity problems,during the preliminary research and demonstration process of the project,extreme optimization research is conducted on the cascade scheme from aspects of guarantee of water resource and comprehensive utilization,comprehensive development adaptability,flood control safety and along-the-way leakage,traffic efficiency and capacity,land occupation and ecological environmental protection,engineering technical difficulty,engineering investment,etc.After research and demonstration,the extreme optimized cascade scheme and route is not recommended,and the recommended scheme is a three-tier ladder scheme.