Objective To investigate the application value of MR SWI and DWI in the diagnosis of liver lesions.Methods 1 300 patients underwent 1.5T MRI scan of liver,no pathology or follow-up examination results of patients with focal liver lesions were excluded,147 patients were included and underwent conventional magnetic resonance(MRI),DWI and SWI.By 2 senior radiologists with double blind method of conventional MRI and MRI combined with DWI and SWI image reading,the feature and enhancement pattern of signal intensity were evaluated.Kappa test was used to evaluate the consistency of the diagnosis of 2 physicians.The pathological examination and comprehensive follow-up results were used as the gold standard.The diagnostic accuracy of the two groups was compared.Results 2 doctors had good consistency in the image diagnosis of the two groups.The Kappa values of conventional MRI and conventional MRI combined with DWI and SWI images were 0.912 and 0.936,respectively.The conventional MRI diagnosed primary hepatocellular carcinoma(HCC) in 40 cases,bile duct cancer cells (ICC) in 13 cases,liver metastasis (HMs) in 14 cases,cavernous hemangioma of the liver (CHL) in 17 cases.The conventional MRI combined with DWI and SWI diagnosed HCC in 50 cases,ICC in 20 cases,HMs in 20 cases,CHL in 24 cases,the differences were statistically significant (x2 =5.660,5.250,5.560,6.640,all P ＜ 0.05).Conclusion Conventional MRI combined with DWI and SWI can provide additional valuable information and improve diagnostic performance for liver lesions.