The invention provides a method for improving the color stability of the solvent naphtha. The solid impurities of the liquid-phase solvent naphtha is removed by being filtered through a filter, the liquid-phase solvent naphtha is evaporated to less than 15 ppm through a conglomeritic dehydrator, and then is led into a fixed bed reactor filled with a composite adsorbent from the lower part to the upper part, to remove the basic nitrogen compound in the solvent naphtha. The method can ensure the removal rate of the basic nitrogen compound to be more than 90 percent, and improve the color stability of the solvent naphtha; the method has the advantages of small floor area, simple technological flow and low cost.