针对220 kV同塔双回线路钻越500 kV线路的方案选择问题，分析了钻越方案的制约因素，采用改变地线悬挂形式、导线排列方式、跳线绝缘子串型式等措施，进行了钻越塔的设计和优化，设计了双回鹰嘴蝶型耐张塔。经工程实际应用证明，该型耐张塔具有良好的推广前景，为220 kV同塔双回线路钻越500 kV线路提供了一种可行的解决方案。

According to the scheme selection of 220 kV double-circuit transmission lines undercrossing 500 kV transmission lines, this paper analyzed the restricting factors of undercrossing scheme. Some measures were suggested such as changing suspension form of ground wire, arrangement mode of conductors and insulator string type of jumper wires. Finally, this paper designed and optimized the undercrossing tower, and proposed a double-circuit tension tower with olecranon-butterfly type. The engineering practical application proves that this tension tower has a good promotion prospect, and can provide a feasible solution for 220 kV double-circuit transmission lines undercrossing 500 kV transmission lines.