Objective : To study diagnostic value of ultrasonic cardiography (UCG) for right heart occupying lesions (RHOL).Methods :A total of 48 RHOL patients ,who were diagnosed in our hospital from Jan 2014 to Jun 2017 , were selected .All patients received UCG and pathological examination to determine lesion location and type .With pathological examination as gold standard ,diagnostic coincidence rate of UCG for RHOL type was analyzed .Re‐sults :RHOL distribution :compared with superior&inferior vena cava ,there were significant rise in percentages of RHOL located at right atrium ,right ventricle and pulmonary artery (6.25% vs.31.25%, 29. 17%, 33. 33%) , P＜0.01 all.RHOL type :percentage of malignant occupation was significantly higher than those of thrombus and myxoma (54.17% vs.20. 83%, 25.00%) , P＜0. 01 both .With pathological examination as gold standard ,diag‐nostic coincidence rates of UCG for thrombus ,malignant occupation and myxoma were 80.00%, 92. 86% and 100% respectively ,there was no significant difference among them , P＝0. 220 .A total of 18 cases (37.50%) with peri‐cardial effusion were found by UCG ,including two cases (4. 16%) who were diagnosed as benign thrombotic lesion by pathological examination ,and the other 16 cases (33.33%) were caused by malignant RHOL invading right heart system ,which included two cases (4.16%) of essential RHOL and 14 cases (29. 17%) with malignant lesion heart metastasis from other sites .Conclusion :RHOL type mainly includes thrombus ,malignant occupation and myxoma , and malignant occupation possesses relatively high incidence rate ,and it usually comes from malignant tumor metas‐tasis from other sites .Accuracy of UCG is high in diagnosing RHOL ,which is worth extending .