Objective: To observe the cerebral bridging veins (BVs) entering into superior saggital sinus (SSS) by color-coded duplex sonography, for provide new hemodynamic reference data for clinical application. Methods: Twenty patients undergoing selective craniotomy about one years and having a good recovery underwent color-coded duplex sonography. The number, diameter and angle of the BVs, the velocity of the SSS and BVs were measured through the surgical bone window. Results: The BVs formed two clusters along the SSS: anterior group and posterior group. The number of the anterior group BVs was (3.1±1.4), the diameter  (2.7±0.7) mm, the angle  (96±33)°, and the mean flow velocity  (10.0±2.8) cm/s. The number of the posterior group BVs was (5.8±1.0), the diameter  (3.2±1.2) mm, the angle  (41±24)°, and the mean flow velocity  (11.4±2.8) cm/s respectively. The number, diameter and the mean flow velocity of the posterior group BVs were larger than that of anterior group. Conclusions: The morphological feature and velocity of BVs entering into SSS can be measured through the surgical bone window under color-coded duplex sonography.