[Objective]The purpose was to discuss the method of extracting purple Cabbage pigment with ultrasound-assisted and its stability.[Method] The single factor and orthogonal tests of taking ultrasound-assisted extraction of the purple cabbage pigment were carried on to determine the optimum conditions and to study the stability of the pigment.[Result]The results indicated that the optimal conditions were determined as follows: ultrasound-assisted power was 80%,extraction time was 50 min,extraction temperature ...