The Xizhuanghe granite is located in Erlangping area of Xixia County, western of Henan Provinces. This paper has studied petrographical, geochemical, zircon U-Pb geochronological and Hf isotope of this granite as well as its petrogenesis and geological significance. The Xizhuanghe granite mainly consists of plagioclase, quarts and minor amphibole, biotite. Geochemical studies indicate that the Xizhuanghe granite has high SiO2 (66.84%~71.57), Al2O3 (14.11%~16.78%) and high Na2O (3.45%~4.78%)，The ratio of Na2O/K2O are between 1.06 and 2.40. but lower MgO (0.88%~1.0%, the index of Mg# is vary from 0.43 to 0.46). also high Sr (327.04×10-6~613.97×10-6) contents, low Y (12.30×10-6~17.17×10-6) and Yb (1.36×10-6~1.88×10-6) contents, with high Sr/Y ratios (24~38). The Xizhuanghe granite has relative medium REE content of（86.79～197.04×10-6）with strong fractionations between LREE and HREE ((La/Yb)N=12.35-34.89), δEu shows slightly negative-obviously positive anomaly (δEu=0.97~1.34) on the chondrite-normalized REE diagrams. Primitive mantle normalized trace element spider pattern shows obvious enrichment in LILE and LREE such as Rb, Ba, Th, U, etc. and relative depletion in HSFE and HREE such as Nb, Ta, Ti, etc., displaying geochemical features of O-type adakites which are related to subduction of oceanic slab. Zircon LA-ICP-MS dating yield the formation age of 460 Ma, represents its magmatic crystallization age Which is almost the same as the formation age of the basic volcanic rocks(460-473Ma) in Erlangping areas. The Xizhuanghe granite has also close relationship in space with Erlangping basic volcanics, which was consider to have been formed in the island arc and back arc-basin, and be related to subduction of oceanic-slab. Combined the geochmical characteristics of O-type adakite and symbiotic relationship between Xizhuanghe granite and erlangping basic volcanics, we conclude that the existence of ocean basin and its subduction in Erlangping areas of the western Henan Province.