Abstract: stability testing and compare of the Hydroextracting the Dark Brown Pigment from Walnut epicarp of dry in the sun and by the airing and retting ． The result showed that the pigment property sameness ,fo example ,can be better solved by H2O，reduce is stronger， activity is better，salt , C12H22O11 , lemon acid and metal iron have little effect ．Our experiments showed that the methed has many advatages，Such as high extraction efficiency ，simply process， less pollution ，and the cost is smoll etc ．but extraction quotiety of the Dark Brown Pigment differ from Walnut epicarp of the three made of dryness ．