Using sodium tungstate as tungsten source, natural soil shaped graphite as carbon source, an experiment is provided for researching the transformation process and rules of them in argon atmosphere at high temperature. The final products are studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectrometer (EDS), etc. The result shows that the mixed samples of sodium tungstate and graphite can generate different tungsten carbon compounds in an argon atmosphere with heat treatment. First, reduction reaction occurs between mixed graphite and sodium tungstate dihydrate at the reaction interface, reducing sodium tungstate dihydrate to α-W₂C and β-W₂C. Second, when the mass ratio of Na₂WO₄ : C is less than 1:1, reduction of α-W₂C to α-WC occurs, till the mass ratio was 1:5, and α-W₂C can be reduced to α-WC completely.