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Objective: To study the diagnostic value of T2*-weighted first-pass perfusion imaging in breast tumors. Methods:We analyzed the magnetic resonance imaging (MRI) information along with the pathological and immunohistochemistry results. Magnetic resonance imaging was performed in 28 patients with breast tumor. The time to signal intensity curves were generated according to the T2*-weighted first-pass perfusion imaging. The curve's maximal signal intensity drop rate and maximal signal intensity decrease time were analyzed and compared with the pathological diagnoses after surgery. Results:Malignant breast lesions showed higher maximal signal intensity drop rate (44.69% ± 17.07 vs. 17.22% ± 7.49, P ＜ 0.001)than benign lesions, but there was no significant difference of maximal signal decrease time between those two lesions (23.94 s ± 4.92 vs. 20.02 s ± 6.83, P ＞ 0.05). Conclusion: The T2*-weighted first-pass perfusion imaging has enough sensitivity and specificity in breast tumor diagnosis.