Abstract： Objective To study the clinical valne of color Doppler ultrasound for the diagnosis of primary ureteral carcinoma. Methods 15 patients with pathologically confirmed primary ureteral carcinoma by color Doppler ultrasound were retrospectively analyzed. Results 15 patients with lesions above the ureter and renal pelvis and varying degrees of expansion,water, of which 11 cases of solid mass within the probe and ureter. Color Doppler showed lesions could be detected, and dot, stripe and dendritic arterial blood flow signal, resistance index (RI) 0. 58 ～ 0. 67.Conclusion Color Doppler ultrasound screening of primary ureteral carcinoma has important diagnostic value, can increase the rate of preoperative diagnosis,and can provide reference for clinical staging.