The Baoshan area in Heilongjiang Province is tectonically located in t he north of the Yichun-Yanshou fold belt lying between the Songliao Block and the Jiamusi Block in the east of the Xingmeng oregenic belt. Large volumes of Pale ozoic-Mesozoic granitic rocks are distributed in this area. This paper deals emphatically on the Late Hercynian granitoids composed of alkali-feldspar granite, monzogranite and granodiorite. LA-ICP MS (laser inductively coupled plasma mass spectrometry) zircon U-Pb dating yielded an age of 252.6±3 Ma. Major element analyses show high SiO2 and alkali content, slightly high Al2O3 content and low MgO and CaO content. Trace element studies demonstrate the enrichment of Rb, Nd, K, Pb, U and depletion of HFSE (high field strength elements) such as Nb, Ta, P, Ti. The samples are enriched in LREE (light rare earth elements) and depleted in HREE (heavy rare earth elements), suggesting a high degree of fractionation. The granites generally belong to the high-K calc-alkaline series and might be produced by the magma that experienced a high degree of crystallization differentiation. Mineral chemistry and petrological geochemistry show that the granites are quite similar to S-type granite, with the material source derived from the crust.