Through statistics and analysis of 40 precipitation processes （≥5 mm） from 1975 to 2004 in Dalian, four kinds of main precipitation weather situation were summarized in the paper, including large trough style, middle latitude system style, north vortex style and south vortex style. At the same time, 22 Doppler radar samples of rainfall processes (≥5 mm) from June to October, 2003 were analyzed. It is summed up that the main precipitation clouds in Dalian are stratus cloud and stratocumulus cloud, and the stratocumulus cloud is more than the stratus cloud, which indicates that the method of rocket rain enhancement operation is more suitable in Dalian. Then the radar operation warning and decision criterion index model is set up and the method is discussed to determine the operation target area by natural rainfall area and social water requirement analysis. According to the weight analysis of radar warning decision index, the paper focuses on the study of the vehicle second scheduling schemes and work flows, which can be a scientific and efficient guarantee for rocket precipitation enhancement operations.