This paper reports whole rock geochemistry and zircon geochronology and Hf isotope of gneissic granite and biotite—amphibole—plagioclase gneiss from the Xiatang area, southern margin of the North China Craton. They occur in Mesoproterozoic granite as enclaves. The gneissic granite shows anatectic features. SHRIMP dating of magmatic zircons yielded an upper intercept age of 230±002 Ga. The rock is high in SiO2 and K2O and low in ΣFeO, MgO and CaO, with a ΣREE content, (La/Yb)n and Eu/Eu* values being 1658×10-6, 378 and 076, respectively. It has εNd(t) (t=230 Ga) of -075 and tDM(Nd) of 266 Ga. The biotite—amphibole—plagioclase gneiss is considered to be meta gabbroic diorite. It contains captured zircons of 225 Ga with no magmatic zircons having been determined. The rock is high in Al2O3 and P2O5 and low in SiO2 and MgO, showing a high ΣREE content (3734×10-6) and low (La/Yb)n ratio (94) and obvious negative Eu/Eu* anomaly (044), with εNd(t) (t=230 Ga) and tDM(Nd) being -121 and 275 Ga, respectively. Combined with early researches, the conclusions can be arrived at that 1) there is a huge about 23 Ga rock distribution area in western Henan, southern margin of the North China Craton, and 2) the Trans North China Orogen shared similar late Paleoproteorzoic tectono thermal evolution to the Khondalite Belt in the northwestern North China Craton.