Abstract: The Early Neoproterozoic deformed granites in Alax area of Inner Mongolia are characterized by high SiO2, alkali (Na2O+K2O) and REE, low Al2O3, CaO, MgO, FeOT, K2O>Na2O, and intensely negative Eu abnormality. Their values of FeOT/MgO and 10000Ga/Al are higher than the values of I-type granite and S-type granite, but similar to values of A-type granite. The most of samples are plotted in the domain of partial melting of greywacke at AFM vs. CFM diagram. Zircon εHf(t) values are near zero, which are obviously lower than those of the depleted mantle εHf(t). These analyzed zircon grains display a maximum peak of their Hf isotopic two-stage model ages at ca. 1.56Ga, which is far older than their forming time (ca. 0.9Ga). Above characteristics in whole-rock geochemistry and zircon Hf isotope of the deformed granites indicate that the parental magma of the granites was derived from partial melting of the older materials that were long residence in the crust. Zircon Ti thermometer of a sample AL0817-2 reveals that these granites were crystallized at ca. 825℃.