The invention discloses a coating process for PU color intrigue wood paint with the color changeable. The process includes the following steps that A, working is performed on a board with primer; B, A, B and C components are thinned in proportion; C, through spraying application, a paint film is dried in the air; D, after the C component is thinned in proportion with basic paint, the product is covered with a layer of clear varnish without polishing, and a paint film is dried in the air; and E, the product is transferred into a constant temperature drying room of 70 DEG C to be dried, and then is packaged and put in storage after being transferred out of the drying room to be cooled. The A component is basic clear varnish, the B component is a curing agent, and the C component is a thinner. Through detection and trail application, it proves that a painted coating is good in covering power, high in adhesive force, hardness and gloss, good in water resistance, chemical resistance and flexibility, and capable of changing different colors. During application, leveling is good, spraying is easy, and the effect is excellent especially on the aspects of hardness, gloss and color-changing capacity.