Abstract: Systematically summed up the research progress of “weather modification project of topographic cloud precipitation(snow) enhancement technology research and experiment in Qilian mountain”, the research progress can be summarized as follows: according to the plan of the project, field detection tests and aircraft observation tests were carried out successfully, and the detection data and weather modification operation of various elements obtained by various means were collected, which provided data support for the effect inspection and evaluation of various operational methods. The characteristics of precipitation field and air flow field in Qilian Mountains are analyzed. The accuracy of instruments and satellite data were verified, the accuracy of FY-3A/MERSI water vapor product and TK-2GPS rocket data were verified, and the inversion method of temperature and humidity of microwave radiometer was discussed. The variation characteristics of cloud and water resources in Qilian Mountains were studied from the aspects of cloud vertical structure, cloud particle characteristics and water vapor. The effect of artificial precipitation enhancement was tested statistically. Simulated the topographic cloud precipitation cases and discussed the occurrence and development mechanism of topographic cloud and precipitation in Qilian Mountains by used WRF mesoscale numerical model. Preliminary results show that: the average annual precipitation in the Qilian Mountains is 232.4 mm; the flow field in the Qilian Mountains region mainly consists of southwest and west flow pattern, convergence and divergence flow pattern, northeast and east flow pattern, northwest and north flow pattern, and south flow pattern; the occurrence frequency of clouds on the Northern Slope of Qilian Mountains is only 20%-40%; precipitation and temperature increased the runoff by 21.1%and 10.9%, respectively; the absolute precipitation increase of artificial precipitation in Shiyang River Basin from April to October was 33.7 mm, the average relative precipitation increase rate was 17.5%, and the average vegetation coverage percentage was more than 46% and remained stable; in summer, the uplift of the Qilian Mountains has a strong local character, and the uplift has a great influence on the precipitation, and the process precipitation usually includes the topographic cloud precipitation.