By discussing the treatment of cancer cachexia with traditional Chinese medicine based on the theory of "cancer toxicity causing deficiency",it is pointed out that "cancer toxin causing deficiency"is the basic etiology and pathogenesis of cancer cachexia.Zhengxu is the pathological basis of cachexia,Cancer toxin is the main cause of cachexia.Fuzheng peiben are the fundamental treatment for cachexia.Detoxification of cancer is the key to the treatment of cachexia.Both should run through the treatment of cachexia.The main TCM therapies for cancer cachexia based on the theory of "cancer toxicity ...