Objective To explore clinical features of bloody ascites.Methods 45 cases of bloody ascites were analyzed as for their clinical characteristics,laboratory examinations, X-ray and endoscope.Results Of 45 cases , 28 cases were males and 17 females with average age of 44 5 years old, 34 cases were malignant tumors,11 cases were non-malignant tumors .Conclusion The incidence of bloody ascites is much high in the malignant tumors,non-malignant ascites is also commonly found in the tuberculous peritonitis.