【Abstract】objective：To improve the recognition，diagnosis and treatment of primary signet-ring cell carcinoma of urinary bladder．Methods：A case for primary Signet—ring cell carcinoma of urinary bladder was reported with review of literature. Its pathogenesis, pathology, clinical presentation, diagnosis and treatment for discussion and analysis. Results :The patient was male，aged 63 years，whose chief complain was totally gross hematuria. CTU show a sharp-demarcated tumor in the right rear of the bladder. We could not find any lesions out of the urinary bIadder from pre—operative examinations，and cystectomy plus urter-abdomen ostomy had been operated. The diagnosis of primary SRCC of the case was made by pathological examination after the operation. The patient had been transferred to the department of oncology for futher chemotherapy after operation and now is under follow up．Conclusions：Signet—ring cell carcinoma of urinary bladder has a series of characteristics such as extremely rare occurrence，fast development，highly malignant，local invasive growth，the trend of early pervasion and transfer，and poor prognosis．Iconography and Cystoscopy are the main methods to diagnose Signet—ring cell carcinoma of urinary bladder, Histopathologic examination is the main way to confirm Signet—ring cell carcinoma of urinary bladder．Ridical cystectomy is the best treatment of choice.