流量大、深沟大跨度的倒虹吸工程，在丘陵山区长距离输水工程中经常出现。此类工程水力学问题很复杂，不可忽视。本文主要反映引黄工程中北干源子河１＃倒虹吸水力学试验中出现的一些主要问题以及处理措施。其中（１）倒虹吸进口前池的水流波动及稳定措施；（２）倒虹吸空管时不同充水流量的流态及其安全措施；（３）倒虹吸管的水头损失。 Large flow, long-span deep siphon inverted siphon project, often occurs in long-distance water projects in hilly areas. Such engineering hydraulics problems are complex and can not be ignored. This paper mainly reflects some main problems and countermeasures in the inverted siphon hydraulic test of the North Qiangyuan River in the Yellow River Diversion Project. Among them, (1) Fluctuations and stabilization measures of water flow in inverted siphon inlet forebay; (2) Flow regime and safety measures of different water filled flow when inverted siphon tube; (3) Head loss of inverted siphon.