Objective To analyze the CT imaging features of patients with pulmonary embolism accompanied by right ventricular dysfunction. Methods 60 patients with pulmonary embolism confirmed by CT pulmonary angiography (CTPA) admitted into the hospital from February 2013 to February 2015 were selected as the research object. And another 40 patients receiving CTPA examination but not complicated with pulmonary embolism were selected as the control group. Thay all received CT pulmonary angiography and ultrasonic echocardiography with 2d. The the diagnostic value of CT in patients with pulmonary embolism accompanied by right ventricular dysfunction was analyzed. Results The maximum stub axle diameter of right ventricular in the research group was (3.65±0.91) cm and the largest cross-sectional area was (18.20±6.12) cm which were significantly higher than those in the control group (P<0.05). Taking ultrasound echocardiography as the standard, the sensitivity of right ventricle expand detected by CTPA was 71.43% and the specificity was 89.74%, the maximum cross sectional area of the central type patients was larger than that of peripheral type patients with pulmonary embolism (P<0.05). Conclusion In the clinical diagnosis of patients with pulmonary embolism accompanied by right ventricular dysfunction, to adopt CTPA examination is of both high sensitivity and specificity and can detect pulmonary embolism and judge whether patients have right heart enlargement and dysfunction, which can provide guidance for the clinical establishment of treatment regimen for patients.