Abstract: Objective: To evaluate the category of the variations on bilateral renal artery and clinical significance with Contrast enhancement MR angiography(CE-MRA). Methods: CE-MRA of 213 patients were retrospectively analyzed. The variations on bilateral renal artery were observed and classified. Results: According to the number of the main renal artery, the anatomy of renal artery was classified in details. The incidence of early branch of the main renal artery and accessory renal artery was 6.57%(28/426) and 13.15%(56/426), respectively. Significant difference of variation incidence was found between male and female. No statistical difference of variation incidence was found between left and right kidney. Conclusion: Anatomical variations on renal artery can be showed clearly with CE-MRA.