Processing method of giant knotweed rhizome

A processing method of giant knotweed rhizome comprises steps as follows: a medicinal material giant knotweed rhizome is immersed in a pretreatment mixed solution of cellulose and beta-glucosidase and processed under different power in a microwave oven, and a microwave processed product of giant knotweed rhizome is obtained; a preparation method of the pretreatment mixed solution is as follows: cellulose and beta-glucosidase are weighed respectively and dissolved with distilled water, and the pretreatment mixed solution is obtained; the weight ratio of cellulose to beta-glucosidase is (1:5)-(5:1). According to the provided processing method of giant knotweed rhizome, content of two effective ingredients of resveratrol and rheum emodin can be remarkably increased simultaneously, the content of polydatin is reduced, and conversion between polydatin and resveratrol in giant knotweed rhizome is accelerated effectively; compared with a conventional processing technology of giant knotweed rhizome, the processing method has no special requirements for temperature, environment and the like, the production conditions are easy to control, the product quality controllability is good, and an effective way applicable to industrial production is provided for application of giant knotweed rhizome, and the processing method has important practical value.