By using the conventional and non-conventional observation data from 2011 to 2018, the characteristics of 38 warm-sector rainstorms days over the Qingdao area were analyzed. Results show that: (1) according to the weather situation, the warm-sector rainstorms over the Qingdao area can be divided into four types, which are Cold-Front type (CF), Warm-Shear type (WS), Subtropical-High Edge type Ⅰ (SH-Ⅰ) and Ⅱ (SH-Ⅱ) producing continuous rainstorms. (2) Warm-sector rainstorms mainly occur in July, August and September, with majority in July and August. Warm-sector rainstorms are closely related to topography, and two rain belts are formed in the southern and northern mountainous areas. (3) All the warm-sector rainstorms have strong convective. The contribution of short-term heavy rainfalls increases with the total rainfall, and the main precipitation period is concentrated into six hours. (4) The weather situations of WS and CF type both have trough in the north and subtropical high in the south, and the low-level southwest jets provide warm and wet air to the north. The cold air of CF type moves southward and forms a northeast-southwest cold front in the south of North China Plain, while the WS type has low eddies in the west of Bohai Sea and WS line in the north of Shandong peninsula in front of the trough. The SH-Ⅰ and SH-Ⅱ type both have low in the west and high in the east. Qingdao is located on the west side of the subtropical high. When the subtropical high and the westerly trough are both strong enough, the continuous rainstorms will occur under the stable weather situation. (5) Warm-sector rainstorms in all types occur at the top of the low-level high-energy tongue and the water vapor convergence area caused by wind speed convergence or topographic uplift.