Objective To investigate the the clinical value of transrectal Acoustic Radiation Force Impulse(ARFI)technology for prostate benign and malignant lesion. Methods 72 patients with prostate lesions were examined by ARFI technology , measurements compared with postoperative pathology, differentiating the benign and malignant tumors.Results ARFI technology for detection of Prostate malignant lesions and benign lesions were compared between groups, the shear wave velocity of the difference is extremely significant ( P < 0.05 ); Prostate benign mass with normal Prostate comparison group also have significant difference ( P < 0.05 ). With the SWV>2.94m/s as diagnostic point for benign and malignant prostate lesions ,the positive predictive value and specificity for malignancy were 86.7% and 66.7% respective .Conclusions ARFI can be used as an important diagnostic test for early diagnosis for prostatic lesions .