Abstract: Based on the mechanism of modern immunology, Professor Ding Ying, a traditional Chinese medicine (TCM) master, uses the analogy of TCM to simplify the complex and calls the abnormal immune response that leads to the onset of immune thrombocytopenia (ITP) "latent poison". She believes that the invasion of latent poison is the basis of ITP; blood damage and marrow injury are the pathological essence of ITP; and the transformation of "poison-deficiency-stasis" is the basic pathogenesis of ITP. She has formulated the treatment principle of "strengthening healthy qi, removing poison, and removing stasis", and attaches importance to the application of rattan drugs and charcoal drugs, which has achieved good results in clinical practice.