Objective To investigate the different manifestations and the diagnostic value of MRI diffusion weighted imaging for the palpable or nonpalpable breast cancer. Methods 89 cases of malignant breast tumors (62 cases of palpable, 27 cases of nonpalpable) were underwent with dynamic contrast-enhanced MR in our hospital. The morphlolgical performance, early enhanced rate, peak enhanced rate and time-signal curve type were analysised and compared. Results (1) morphological manifestations: 62 cases of palpable breast cancer tumors showed heterogeneous enhancement 13 (21.0%), homogeneous enhancement 43 (39.4%), edge enhancement in 6 (9.6%); 27 cases of nonpalpable showed heterogeneous enhancement 9 (33.3%), statistically significant 18 (66.7%), and the difference between the two.(2)The early enhanced rate of palpable and nonpalpable breast cancer were 198.83±38.51%, 143.59±39.22%, the peak enhanced rate cancer were 209.55±40.24%、157.31±35.02%, There were statistically significant differences (P<0.05) in the early enhanced rate and peak enhanced rate between the two group breast cancer .(3)TIC type: there were Ⅰ type curve 5 cases (8.1%), type Ⅱ49 (79%), Ⅲ 8 cases (12.9%) in 62 cases of palpable breast cancer; there wereⅠcurve 8 cases (29.6%), type Ⅱ 15 (55.6%), Ⅲ 4 cases (14.8%) in 27 cases of nonpalpable breast cancer, and there was a significant difference (P<0.05) between the two group. Conclusion There were statistically significant in morphologic features, quantitative parameters and TIC type of the palpable and nonpalpable breast cancer, the morphologic features, quantitative parameters and TIC type of dynamic contrast enhanced MRI are valuable in the diagnosis of palpable and nonpalpable breast cancer