Objetives: The Taiping pluton is located in Huangshan city，Anhui province. It is mainly composed of granodiorite，and a crossed by several nearly NS direction monzogranite porphyry dikes in its west. Methods:Countersigned the age of granite by zircon UPb dating and their petrology characteristics by whole rock analysis. Results:The LAICPMS zircon UPb dating yield out a weighted average 146.8±1.2 Ma for granodiorite and 131.0±1.2 Ma for monzogranite porphyry from Taiping Gantang town. For granodiorite，the A/CNK is less than 1，the content of CaO and Na2O is high，and the REE pattern is in right dip form with weakly negative Eu anomalies or no Eu anomalies. It is relative depletion in Nb，Ta，Ti，and belong to metaluminous Itype granites. The monzonitic granite porphyry is riched in SiO2，K2O+Na2O，K2O/Na2O，and obvious depletion in Eu. In the spider diagram，there have been appearance four grooves as a result of depleted in Ba，Sr，P，and Ti. It can be concluded that the monzonitic granite porphyry belongs to peraluminous Atype granites. Conclusions:Combining the previous results，this paper believes that the lithology of Huangshan composite body had underwent the comagmatic evolution from granodiorite to monzogranite porphyry，then to granite，and the geochemical characteristics and diagenetic pressure are gradually changing during the process. It is also believed that the tectonic dynamic mechanism had experienced a transition from extension to compression in Anhui—Zhejiang—Jiangxi adjacent area during the early Jurassic. While the decreasing diagenetic pressure suggests that the mechanism of Mesozoic lithospheric thinning in south China are more inclined thermal erosion model.