Abstract: Adopted carmine radish as raw material, the research extracted pectin from carmine radish by microwave-assisted method and determined the best processing conditions of extracting pectin. Based on the single factor experiment, used the response surface optimization experiment, and made the extraction yield as the index, the best technological conditions was determined:pH was 2, liquid-solid ratio was 25∶1, heating time was 8min, microwave power was 450W, in the condition, maximum extraction yield was 12.58%. Through microwave processing, the operating time was shorter, the amount of extraction solvent was less. This method could be taken as reference to the production practice.