Objective：To evaluate the characteristics of MRI of common hepatic lesions by using measurement of T1,T2 and ADC on the MRI and DWI. Methods：MRI and DWI were obtained in 100 patients with common hepatic lesions, and T1,T2,ADCs and the ratios of the ADC of lesion/liver were estimated. Results：Average T1,T2 and ADCs of hepatic lesions were as follows： hepatocellular carcinoma, (843.92±167.75) ms , (73.90±14.21) ms and（0.99±0.26）×10-3mm2/s respectively; hepatic metastasis, (946.89±186.13) ms, (76.39±19.76) ms and（1.17±0.32）×10-3mm2/s respectively; hepatic cavernous hemangioma, (1102.33±213.12)ms, (142.32±28.51) ms and (1.81±0.42)×10-3mm2/s respectively; hepatic cyst, (1516.32±617.84)ms ,(247.33±112.52)ms and (3.11±0.38)×10-3mm2/s respectively. The ratio of the ADC of lesion/liver：hepatocellular carcinoma was 0.89±0.17, and significantly lower than the ratio of hepatic metastases(1.27±0.21, P＜0.05). Conclusions：Quantative study of hepatic lesions using T2, ADC and the ratios of the ADCs of lesion/liver, can accurately distinguish the nature of the lesions, and MR1 can accurately diagnose and differentiate hepatic lesions.