The characteristics of the 4 tropical cyclones landfalling in Qingdao from 1949 to 2019 are firstly analyzed by using yearbooks of tropical cyclones in China, surface and sounding observations, NCEP／NCAR reanalysis data as well as sea surface temperature data from NERA-GOOS. Then difference analysis is carried out for the precipitation caused by Typhoon LEKIMA (2019) in Shandong Peninsula. The results are shown below. 1) There are 4 typhoons that land in Qingdao with northward-moving or turning tracks in August since 1949. The large-scale circulation in mid-high latitudes is dominant by zonal circulation. The main body of subtropical high maintains over the east coast of China, the intensity of the center is higher than that in the normal years, and the westward ridge line lies between 30°N and 36°N. Additionally, the sea surface temperature is above 27 ℃ over the coastal waters of Qingdao. 2) The differences of interactions over Qingdao between the cold air from midhigh latitudes and tropical systems and the intensity and center’s position of the subtropical high result in differed precipitation by landfalling typhoons. 3) Typhoon LEKIMA has an effect on the precipitation in Weifang during the interaction between the typhoon and westerly trough while on that in Qingdao through the southeast airflow in front of the low pressure circulation. 4) Despite the favorable water vapor conditions and convective unstable stratifications both at Weifang and Qingdao, the lifting conditions are significantly differed. Weifang is located inside the convergence zone of northeasterly and southeasterly winds and high-value zone of water vapor flux convergence with strong vertical shear of horizontal wind and ascending motion. In Qingdao, there is no cold air intrusion, while the strong southeasterly jet in the low level or ultra-low level provides abundant water vapor and unstable stratification for the rainstorm.