The invention discloses a method for improving the color stability of a colored bituminous pavement. A coupling agent is added to raw material colored bituminous cement for preparing colored bituminous concrete, and the coupling agent accounts for 0.1-1.0% of the weight of the raw material, wherein the coupling agent is a silane coupling agent, a titanate coupling agent or an aluminate coupling agent, or a mixture of the three coupling agents in any weight ratio. The method is simple in process, low in cost, and easy to industrialize. The colored bituminous cement prepared by the method is used for preparing the colored bituminous concrete for paving the pavement; experiments prove that the colored bituminous cement is high in tinting strength and stable in color, and has excellent dispersibility, light resistance, weather fastness and water damage resistance, and therefore, the usability and the service life of the colored bituminous pavement are remarkably improved so that the application range of the colored bituminous pavement can be expanded.