Objective To analyze the 3.0T magnetic resonance dynamic enhancement characteristics of breast cancer patients. Methods A total of 50 cases of breast cancer admitted to our hospital from January 2015 to August 2019 were selected as the research subjects. Magnetic resonance imaging (MRI) was performed, the changes of adjacent structures,morphology, MRI signal, enhancement mode and time signal intensity curve were observed, indicators for early diagnosis of breast cancer were screened out. Results There were 68% (34/50) breast cancer patients with irregular shape of tumor, and 32% (16/50) breast cancer patients with round shape tumors. There were 80% (40/50) patients with "spiculation sign" on the edge, and 58% (29/50) patients with Cooper ligament (breast suspension ligament). Among the lesions, 54% (27/50) patients had sand like calcification, 44% (22/50) patients had local skin thickening, and 18% (9/50)patients with nipple collapse. 76% (38/50) patients had a circular strengthening, and 26% (13/50) patients had contrast filling signs. 68% (34/50) patients showed fast-forward and fast-out curve, 24% (12/50) patients showed plateaushaped curve, and 8% (4/50) patients showed slowly rising curve. Conclusion Multi parameter comprehensive evaluation of various indexes in dynamic contrast-enhanced MRI can be used as an important reference factor in the diagnosis of breast cancer, which is helpful to the early diagnosis of breast cancer.