Jiaodong area is the most developed and typical area of Mesozoic granite in Shandong province, which is closely related to gold deposits. The division of granite mainly depends on regional geological survey with the scale of 1 ∶ 50000 carried out in 1980s to 1990s. Due to many completion units, different completion times and different map sheets, the division of intrusive rocks is different, so the division of granite is not unified. In this paper, Mesozoic granites are divided in detail according to the division method of "age+magmatic event+lithology" for the first time. The granites widely distributed in Jiaodong area, with genetic connection, the same lithology and the same formation age are divided into the products of the same magmatic event. The magmatic event is named as the regional magmatic activity event unit below the "epoch", which is divided into Linglong period of late Jurassic (146~166Ma), Guojialing period of early Cretaceous (123~135Ms) Weideshan period (110 ~123Ma) and Laoshan period (108~120Ma) in late period of early Cretaceous. Linglong period is crustal remelting granite, Guojialing period and Weideshan period are crust mantle mixed granite, and Laoshan stage is A type granite. Granite with limited distribution and special lithology is called independent rock mass. According to the method of "age + lithology", it is divided into four independent rock masses, they are Ningjinsuo rock mass of late Triassic, Chashan rock mass of late Triassic, Duogushan rock mass of late Jurassic and Wendeng rock mass of late Jurassic. The Mesozoic tectonomagmatic evolution in Jiaodong area reflects the transformation process of Mesozoic tectonic system in eastern China. It is the transformation process of SN compression to EW extension of Yangtze plate, and NW compression of North China plate to NE extension of Pacific plate and Eurasian plate.