Objective To investigate the dynamic enhanced MRI scanning and mammography combined assessment of clinical value of breast conserving surgery or breast cancer patients. Methods Data from January 2016 to August 2017 in patients with radical surgery in our hospital for breast cancer were retrospectively analyzed. The preoperative and dynamic contrast-enhanced MRI, mammography, observation the clinical value of dynamic contrast-enhanced breast conserving surgery can MRI and mammography were evaluated. Results Mammography and dynamic enhanced MRI in the detection of the main tumor number, there was no significant difference between long diameter (P>0.05), mammography sub foci number, distance from the areola Areola, invasion, calcification, muscle invasion, lymph node metastasis and the number of dynamic enhanced MRI were statistically significant (P<0.05). Dynamic enhanced MRI predictive specificity, the sensitivity of breast conserving surgery, and the coincidence rate of AUC was higher than that of mammography, dynamic enhanced specificity of breast conserving surgery and MRI molybdenum target X line positive predictive was higher than that of dynamic enhanced MRI and mammography; sensitivity is higher than that of pure molybdenum target X-ray dynamic enhanced MRI and dynamic enhanced MRI or positive predictive mammography in breast conserving surgery. Conclusion Dynamic contrast-enhanced MRI and mammography are evaluation of breast conserving surgery for an important examination method, two Each has its own advantages and disadvantages, and it can be applied flexibly according to the actual situation.