采用现场测试的方法研究公路隧道内全射流通风的压力分布情况。测试结果表明，隧道入口段气压高于当地大气压力，为相对正压，出口段气压低于当地大气压力，为相对负压，在隧道中存在一个与大气压力相等的点，即相对压力为0的点。本次现场测试可为全射流纵向通风的设计提供参考。

 Full jet current ventilation has many benefits such as low construction cost, good use of traffic wind, easily implement by stages and low operating costs, which is usually applied into highway tunnel with length less than 5000m. Field tests were carried out to study the air pressure distribution of highway tunnel with full jet current ventilation. Test results show that the air pressure at the tunnel entrance is above ambient atmospheric pressure; the air pressure at the tunnel exit is below ambient atmospheric pressure and there is a point at which the air pressure is equal to the ambient atmospheric pressure. This test can provide reference to the design of full jet current ventilation.