This paper introduces the clinical experience of Professor Liu Lumin in the treatment of pancreatic cancer ascites with integrated Chinese and Western medicine, and provides a new thought for the treatment of the disease. Professor Liu has three main characteristics in the treatment of pancreatic cancer ascites: the use of Binglang(Semen Arecate) to promote qi flow and excrete water, the use of integrated traditional Chinese and Western medicine to promote diuresis, and the simultaneous use of internal and external treatment to suppress cancer and eliminate water. Combined application of the three methods can often achieve good results.