Objective:To optimize ultrasonic assisted extraction technology of polyphenol from fruit of Cerasus humilis

and compare the content of polyphenol from peel

pulp

juice and other parts in Jingou 1

Jingou 2 and B7-1 of different varieties of C. humilis. Method: Single factor test was used to investigate influence of the concentration of ethanol

solid-liquid ratio

extraction time and temperature on ultrasonic extraction effect of polyphenol from fruit of C. humilis

and extraction technology was optimized by orthogonal test.Difference of the content of polyphenol was compared

which were in different parts of fruit from different varieties of C. humilis. Result: Optimal ultrasonic assisted extraction conditions were as follows:extracted 75 min with 25 times the amount of 40% ethanol at 70 ℃

under these conditions

yield of pilyphenol was up to 16.3 mg·g-1.The content of polyphenol was in order of peel>edible parts (removal kernal)>pulp>juice in three varieties. Conclusion: It suggested that difference in the content of polyphenol from peel and pulp among different varieties were found

and this study provided a theoretical basis for comprehensive utilization and depth processing industry in peel of C. humilis in the future.