Objective To analyze the value of magnetic resonance imaging(MRI)in the diagnosis of breast tumors.Methods Fifty patients with breast tumor who received treatment in the Second Affiliated Hospital of Guizhou Medical University were selected for the study from June 2021 to June 2023.MRI and pathological examination were performed on the patients respectively,and pathological results were used as the gold standard to analyze the diagnostic efficacy of MRI.Results MRI diagnostic accuracy,sensitivity,speciality were 94.00%,97.67%,and 71.43%,respectively.Conclusion MRI has a high diagnostic efficiency in the diagnosis of breast tumors.