Abstract: Based on the "underground engineering simulation wind tunnel" of Taiyuan University of Technology to make scale model and do some simulation tests, how to use the wind tunnel to explore the characteristics of flow field is mastered, and this is a new research method. And the distribution map of wind is made by analyzing the test data .This test indicates that the wind distribution of rectangular cross roadway section is symmetry. The maximum speed appeares in the bottom of the center of roadway, and the distance from the center point is approximately the roadway section equivalent diameter of 15 % to 25%. In the vertical and horizontal axis of symmetry and two diagonals of the section, the distribution of wind speed meets the form of logarithm function.