Late Jurassic granite in Jiaodong area is mainly exposed in Zhaoyuan, Laizhou, Wendeng, Rushan and other areas, including Linglong pluton and Queshan-Kunyushan pluton. In between, the Qixia region is dominated by Archean TTG-type rocks. This time, many meso-grained monzogranite xenoliths were found in the diorite porphyrite veins (surrounding rock is TTG type rock) in Shangqujia village, Qixia area, the SHRIMP U-Pb age of zircon from monzonitic granite is 161.0±2.2 Ma. The ratio of ¹⁷⁶Hf/¹⁷⁷Hf ranged from 0.281 929 to 0.281 971, the εHf (t) was -26.39 to -24.77, t_DM2 was 2 871 to 2 773 Ma. The monzogranite xenoliths are characterized by high potassium, high aluminum,low magnesium and iron. They are peraluminous, high potassium calc-alkaline rocks, which are deficient in heavy rare earth elements and have obvious fractionation of light and heavy rare earth elements. The ratio of (La/Yb)_N varies from 28.11 to 78.50, there are obvious Eu positive anomalies (Eu/Eu^*=1.16~1.77), and the large ion lithophilic elements Rb, K, Ba and Sr are relatively enriched. Its isotopic geochronology, petrology, and rock geochemical characteristics are basically consistent with those of the Linglong pluton and the Queshan-Kunyushan pluton. It is the result of partial melting of the crust thickened by the collision between the Yangtze plate and the North China plate under the background of the movement of the ancient Pacific plate. The source area is mainly composed of TTG type rocks. This article believes that these diorite xenoliths belong to the Linglong period granite. Based on the interpretation of regional gravity anomalies, it is believed that there is a hidden Linglong period granite body in the lower part of TTG rocks in the Qixia area. It is speculated that the range extends from the Douya fault in the west to the Taocun fault in the east, to the northern edge of the Jiaolai Basin in the south, and to the southern edge of the Zangjiazhuang Basin in the north. The Linglong pluton and the Queshan-Kunyushan pluton may be connected in the deep part.