Abstract：Objective：To explore the rule of the syndrome differentiation and treatment of psoriasis from the perspective of lung through literature mining. Methods： The literature retrieval strategy was developed， and qualified literatures were screened out according to the inclusion and exclusion criteria. After the establishment of database and data preprocessing， data mining methods such as frequency analysis and association rule analysis were applied to obtain the syndrome and medication frequency of psoriasis treated from the perspective of lung，as well as the association rules between syndrome and symptoms ， and those between syndrome and medicine. Results ： A total of 47 qualified literatures ， including 40 syndrome types and 82 prescriptions were included. Nine syndrome types were obtained after the specification and consolidation of syndrome names. According to the statistics of occurrence frequency， the top four were the wind- heat syndrome of lung channel，syndrome of lung dryness damaging the yin，syndrome of lung heat obstruction and excess，and syndrome of wind- cold attacking the lung； the basic prescriptions were Yinqiao powder， Qingzao Jiufei tang， Qingwen Baidu yin and Mahuang tang. Conclusion：The treatment of psoriasis from the perspective of lung is supported by literature evidence and has clinical practical value， which can enrich the method of differentiating psoriasis and broaden the idea of treatment.