Objective To summarize ultrasonograph changes and to investigate the diagnositic value of ultrasonography in pa‐tients with thrombophlebitis in superficial dorsal vein of penis .Methods The ultrasonograph finding and clinical data in 19 patients with thrombophlebitis in superficial dorsal veins of penis diagnosed by clinic were retrospective analyed .Results Compared with normal volunteers ,the internal diameter of patients′venae dorsales penis superficiales were significantly widened (P<0 .01) .Low level echoes were found in superficial dorsal vein of penis and showed strip ,arborization ,semiring and circular shape .It mainly hap‐pened in root segment(63 .2% ,12/19) ,and coronary sulcus was the second one(26 .3% ,5/19) .There were no significant difference in left and right side (P>0 .05) .Conclusion Ultrasonograph was a practicable way to examine dorsal veins of penis and an effec‐tive way for the diagnosis of thrombosis ,which could accurately diagnose thrombophlebitis in superficial dorsal veins of penis .