The NCEP reanalysis data and FY-4A geostationary satellite data are used to analyze the atmospheric circulation characteristics and cloud macroscopic characteristics of the typhoon "Lekima" throughout its life history. Based on the data from GPM satellite (Dual-frequency Precipitation Radar, DPR), the macro and micro characteristics of a precipitation process during typhoon "Lekima" are analyzed. The results show that the western Pacific subtropical high pressure, troughs and ridges on high altitude in the north of 40°N, high-pressure located in (35°N, 80°E) and the typhoon "Krosa" have all exerted important impacts on development and movement of typhoon "Lekima" during its life process. The distribution of the cloud successively performs as spiral, comma, central symmetrical structure and irregular shape, and the cloud area and cloud top height on the north and south sides are constantly changing. In a precipitation process during typhoon "Lekima", the near-surface precipitation rate is roughly annular, and the north-south distribution of precipitation particle concentration and precipitation particle radius is quite different from the east-west distribution. Except that the cloud wall precipitation is convective precipitation, and other parts of the precipitation mainly are stratified precipitation. The storm top height corresponding to the stratus precipitation is 4.5-12 km, mainly concentrated at 5.5-10 km; the storm top height corresponding to convective precipitation is 1-12 km, mainly concentrated at 2-5 km and 6-11 km.