Abstract: Based on the actual engineering requirements of Revit pipeline auto-labeling, this paper divides parallel pipeline labels into two categories of no-adjustable and adjustable parallel pipeline labels and describes three situations which will lead to pipeline diameter changes.In addition, the paper puts forward a method of using lead vertical to solve the problem of the changeable diameter parallel pipes labeling.The experimental results show that: this kind of labeling methods greatly increase labeling efficiency, and compared to the use of Revit interactive interface, they simplifies the operation, improve the labeling efficiency and provide some experiences for secondary development in the future.