Objective To get the law of failure of the organic coating in the desert atmospheric environment in a relatively short period of time. Methods Acrylic polyurethane coating which is widely used in organic coatings was selected in the test, the accelerated aging test of the organic coating in desert atmospheric environment was carried out using the method of UV exposure and blowing sands test in the laboratory, and the aging process of the organic coating was characterized by changes in coating mass, thickness , gloss, the surface morphology and the electrochemical impedance. Results It turned out that the organic coating began to degrade with the decrease of mass, gloss, thickness and impedance but the increase of micro defects which implied the decrease of coating protective properties with time. Conclusion The law of degradation of the organic coating in desert atmospheric environment could be quickly obtained by accelerated test.