Abstract: In the process of outdoor integrated pipeline design by using BIM technology, there is the problem that twodimensional drawings can not be generated directly by BIM model or the drawings generated are difficult to meet the requirements of drawing, which seriously reduces the efficiency of BIM design. This article studied the drawing process of outdoor integrated pipeline, elaborated its preparation work and drawing process in detail, and formulated a unified drawing standard, implemented the rapid generation of two-dimensional drawings by BIM model of outdoor integrated pipeline, and greatly improved the efficiency and quality of BIM design. The results was applied to outdoor integrated pipeline design projects of many railway rolling stock maintenance bases in China, and achieved remarkable results.