研究目的: 渝黔为客货共线铁路,是川渝、西北地区通达贵州、广西、广东、海南的便捷、快速、大能力通道的重要组成部分，线路从贵阳市北部引入贵阳枢纽，客车引人贵阳北站办理，货车在何处下线才能对城市规划 干扰小，工程投资省，是渝黔引人枢纽需解决的首要问题。本文通过对联络线接都拉营站与联络线接既有川黔线两个联络线疏解方案对比分析，以确定经济合理的线路疏解方案。

Research purposes：The Chongqing - Guizhou railway is a line for the mixed passenger and freight traffic, and is an important part of the convenient，rapid，large capacity channel from the Sichuan，Chongqing and the northwest area to the Guizhou, Guangxi, Hainan, Guangdong areas. The line needs to access into the Guiyang hub in the northern city and the passenger train of the railway accesses into the Guiyang Bei Station. But where does the freight train access into the Guiyang hub is the urgent problem to be solved because it relates to the disturbance level to the city planing and the construction investment. This paper compares and analyzes the two optional plans of accessing the freight train into the Dulaying Station via connecting line and accessing the fright train into the existing Sichuang - Guiyang Railway via connecting line to determine the more reasonable plan.