Objective:To investigate the relationship between the expression mP53 and microvessel density urothelial carcinoma of the bladder and its clinical pathological significance. Methods: Immunohistochemistry(Envision method) was used to detect the expression of mP53 and FⅧ-RAg in 50 tissue specimens of primary BUC and 10 tissue specimens of normal mucosa of bladder .The results were analyzed with the clinic and pathological characters of BUC. Results: The expression of mP53 and MVD had significant differences between the tissues of normal mucosa of the bladder and the tissues of the BUC; but not related to the tumor size. mP53 and MVD value had correlation to different stages (according to UICC-TNM ), different grades (according to WHO), and recurrence(P