Objective To discuss the imaging features on myocardial contrast echocardiography of cardiac malignant tumor. Methods Twenty-seven patients with cardiac malignant tumor were evaluated and the routine transthoracic echocardiography（TTE），myocardial contrast echocardiography（MCE） and pathological characteristics of cardiac malignant tumor were analyzed. Twenty-seven patients with cardiac malignant tumor were divided into primary tumor group(6 cases) and secondary tumor group(21 cases) according to the pathological and clinical diagnosis results. The findings of TTE, MCE and ratio of tumor A value to normal cardiac A value (A value:peak intensity of ultrasound contrast agent) were compared between primary tumor group and secondary tumor group. Results 6 primary cardiac malignant tumors （100%） were all highly enhanced，13 secondary cardiac malignant tumors（61.90%） were highly enhanced while 8 secondary cardiac malignant tumor（38.10%）were lowly enhanced. There were no differences in the enhancement degree between primary and secondary cardiac malignant tumor（P=0.136）. Tumor A/ myocardium A of primary and secondary cardiac malignant tumor were respectively 2.31±0.65，1.25±0.51. There were significant differences in tumor A/ myocardium A of MCE between primary and secondary cardiac malignant tumor（P＜0.05）. When tumors were≤5 cm，high and low enhancement were illustrated in 3，6 cases，respectively. When tumors were＞5 cm，high and low enhancement were illustrated in 16，2 cases，respectively. There were significant differences in enhancement degree between lesion size of ≤5 cm and ＞5cm on MCE（P＜0.05）. Conclusion The MCE of all cardiac primary malignant tumor was highly enhanced and the cardiac secondary malignant tumor was highly or lowly enhanced. Most of the cardiac malignant tumors with > 5.0cm in diameter were highly enhanced in MEC.