现代一些大型低速风洞出于测量上的考虑，往往在试验段侧壁开有供移测架移动的槽道。本文则以西南交通大学低速工业风洞为例，分析了这种槽道结构对试验段方向场的影响。试验结果表明，不同的槽道封闭状态对试验段流动的方向场，特别是β（偏航角）方向场有较明显影响，为此，本文最后提出了一种改进方案。 Some modern large-scale low-speed wind tunnel for measurement reasons, often in the experimental section of the side wall for the movement of the channel for the migration test. In this paper, Southwest Jiaotong University, low-speed industrial wind tunnel as an example, analyzes the channel structure of the test section of the direction of the field. The experimental results show that the different closed states of the channels have a significant influence on the direction field of the test section flow, especially the β (yaw angle) direction field. Therefore, an improved scheme is proposed at the end of this paper.