There are still problems of structural water shortage in some remote areas of China One of the ways to solve this problem is to design a device that utilizes the inherent hydraulic power in the river to realize the function of pumping water. The object of the study is a set of water-lifting device that converts natural low-drop hydraulic energy into high-pressure gas and then pump the water to the higher lift with the resulting high-pressure gas. Through the analysis of experimental data and observed phenomena, the relationship between the gas consumption and the capacity of water delivery is explored, and the influence of the factors such as the diameter of the inlet pipe, the height of the returning water, the submerged ratio and the outer diameter of the pump pipe are taken into account, and the law of interaction between gas consumption and water withdrawal is obtained. The experimental conclusion can provide scientific basis for the practical engineering application of the device.