The invention discloses a method for degumming a real silk fabric and belongs to the technical field of printing and dyeing. The method is characterized by comprising the following steps of: putting the real silk fabric into mixed degumming solution and performing degumming treatment at the temperature of between 50 and 100 DEG C for 10 to 60 minutes, wherein the real silk degumming solution consists of an alkaline substance which is 2 to 25 percent (o.w.f) based on the weight of the real silk fabric and an alkali-resistant nonionic surfactant which is 2 to 10 percent (o.w.f) based on the weight of the real silk fabric. By reasonably selecting chemical substances and setting technological conditions, the high-efficiency technology for degumming the real silk fabric has the obvious advantages of high degumming efficiency, and little reduction of the fabric strength; and the silk fabric treated by the technology has the degumming rate of more than or equal to 21 percent and strength reduction rate of less than or equal to 10 percent, and has the advantage of better improving the quality of the real silk fabric.