Abstract: The microwave assisted extraction(MAE) conditions including extraction methods,solvent types and concentrations,ratio of solid to liquid,microwave power,and controlling time of polyphenol from olive processing pomace were investigated.The results indicated that the polyphenol content extracted under MAE was higher than 18%-38% compared with the conventional solvent extraction method,and the best solvent was ethanol.The optimized MAE parameters using orthogonal experimental design based on the single factor experiments were∶ ratio of solid to liquid 1∶ 20(g∶ mL),microwave power 300 W,extraction time 3 min,extraction solvent 60 % ethanol.Verification of the optimization showed that the polyphenol content of 1.02 % was obtained under the optimal conditions.