The invention provides a single-component archaistic coating composition. The single-component archaistic coating composition is prepared from, by weight, 40-70 parts of coumarone resin, 4-6 parts of paint film property enhancement auxiliary, 0.2-0.4 part of wetting dispersant, 0.3-0.6 part of compound drier, 13-30 parts of true solvent and 10-25 parts of cosolvent. Compared with the prior art, according to the single-component archaistic coating, a paint film is excellent in weather resistance, good in acid resistance, alkali resistance and water resistance, good in flexibility, good in adhesive force on commonly used substrates, resistant to high temperature and not prone to aftertack, and the coating is low in odor and low in toxicity. After the coating composition is adopted to conduct compound operation on a product, the product is made old, the product looks like being provided with irregular flower traces and traces of oxidation or discoloration or even an illusion of erosion wear is produced, a modern product can present a retro feeling, and meanwhile due protection performance on the product is achieved.