】风洞试验是进行汽车空气动力学研究的重要手段，介绍了试验数据系统，论述了用小型航空风洞进行厢式载货汽车模型试验时雷诺数、堵塞比、模拟地板等重要技术问题；给出了厢式载货汽车改善气动阻力特性的试验结果 The wind tunnel test is an important means to study the aerodynamics of vehicles. The experimental data system is introduced. The important technical problems such as Reynolds number, jam ratio and simulated floor are discussed when using the small aviation wind tunnel to carry on the model test of van. The test results of improving the aerodynamic drag characteristics of van are given