The invention discloses a method for detecting micro-arc oxidation arcing characteristics of an alloy by using an anodic polarization curve, and relates to a micro-arc oxidation method for the alloy, which aims to solved the technical problems of high working amount and waste of electric energy and solution raw materials caused by the conventional method for verifying influences of types and using amount of additives in an electrolyte solution on the micro-arc oxidation arcing characteristics by using a micro-arc oxidation experiment process. The method comprises the following steps of: measuring the anodic polarization curve, which uses voltage U as a horizontal ordinate and current I as a vertical coordinate, of the alloy in an electrolyte solution to be verified; judging whether micro-arc oxidation can be performed or not due to the existence of a passivation area; determining micro-arc oxidation arcing discharging voltage of the alloy in the electrolyte solution according to widths of passivation intervals; and when the widths of the passivation intervals are approximate to one another, determining the micro-arc oxidation arcing discharging voltage of the alloy in the electrolyte solution according to polarization current of a passivation film before destabilization. By the method, energy sources are saved for a low-voltage low-current-density process; and the method can be used for predicting the micro-arc oxidation arcing characteristics of the alloy.