[Objective]To investigate Professor WANG Donghong's experience in the treatment of polycystic ovary syndrome(PCOS)based on the theory of Xuanfu-turbid evil combined with identification of viscera.[Methods]Through clinical shadowing and the collection of medical records of outpatients with PCOS,Professor WANG's academic thinking and clinical experience in the treatment of PCOS based on the theory of Xuanfu-turbid evil combined with the identification of viscera were summarized and discussed,and a case was attached to prove it.[Results]Professor WANG believes that the development of PCOS is closely related to the liver,spleen and kidneys,the Xuanfu of the three organs are obstructed,movement of Qi is not regulated,the fluid metabolism is imbalanced,Qi stagnation,phlegm,blood stagnation and turbidity are generated,leading to disharmony between Qi and blood,resulting in PCOS.Professor WANG proposes that opening up the Xuanfu and expelling turbid evil is an important treatment for PCOS,combined with the differentiation of syndromes in the viscera,different treatment methods are applied,such as soothing the liver,relieving depression and cooling blood,strengthening the spleen,dispelling dampness and phlegm,warming the kidney,promoting blood circulation and removing blood stasis.The attached case in the article was PCOS with liver depression and phlegm coagulation type,based on the theory of Xuanfu turbid evil,it was treated by calming the liver and opening depression,regulating Qi and resolving phlegm,and achieved remarkable results.[Conclusion]Professor WANG's treatment of PCOS is based on the theory of Xuanfu and turbid evil and is highly effective,providing new ideas for the clinical treatment of PCOS.