Early Precambrian basement is well developed in western Shandong Province of the North China Craton. This paper shows a systematic study of the monzogranites from Culai Mountain,western Shandong, revealing the evolution history of Precambrian crust in the eastern part of North China Craton. LA-ICP-MS zircon U-Pb isotopic dating shows that the monzogranites from Culai Mountain were formed at about 2.48 Ga, which also restricts the time limit of metamorphism-anatexis in Culaishan area. The rocks have high Si, Na and K, low P, a A/CNK ratio of 0.94～1.10, and belong to the high-K calc-alkaline series. The monzogranites exhibit enriched light rare earth elements (LREEs) with no δEu anomalies, and are enriched in large ion lithophile elements (LILEs) (e.g., Rb, Sr and Ba), and depleted in high field strength elements (HFSEs) (e.g., Nb, Ta, P and Ti). Based on comprehensive analysis, it is believed that the monzogranite from Culai Mountain originated from partial remelting of the about 2.7 Ga thickened lower crust (tonalite TTG rocks). Formed in an extensional environment after collisional orogenesis, it marks that the completion of the collage of micro-land masses in western Shandong in the late Neoarchean, and together with other regions to formed a stable North China Archean Craton.