Objective To investigate the clinical value of echocardiography in evaluating left ventricular function in patients with acute pulmonary embolism (APE) of different risk levels. Methods 94 APE patients (35 in lowrisk group, 31 in mediumrisk group and 28 in highrisk group) were selected and 50 healthy people in the same period were selected as the control group. The echocardiographic values (HR), the ratio of right ventricular end diastolic diameter to left ventricular end diastolic diameter (RVED/LVED), pulmonary artery systolic pressure (PASP), left ventricular end diastolic volume (LVEDV), left ventricular end diastolic volume (LVSV) were compared and analyzed.Results The levels of HR, RVED/LVED and PASP in APE group were significantly higher than those in control group (P＜0.05), and HR, RVED/LVED and PASP were all increased with the increase of risk classification (P＜0.05). Compared with the control group, the level of LVEDV, LVESV and LVESV in APE group was significantly lower (P＜0.05), and the level of LVEDV, LVESV and LVSV decreased with the increase of risk classification (P＜0.05). There was no significant difference in LVEF between APE group and control group (P＞0.05). Conclusion APE patients have different degreesof left heart function damage, echocardiography can effectively evaluate the change of left heart function, which is of great significance for the early diagnosis of the disease.