Objective To explore the effect of antidepressant adjuvant treatment for chronic prostatitis (CP),and to find an effective treatment for the clinical therapy of CP.Methods 88 patients with CP were randomly divided into two groups,the control group 41 patients were treated with the antibacterials moxifloxacin,the treatment group 47 patients were treated with the moxiiloxacin treatment and paroxetine adjuvant therapy.The clinical symptoms,life quality (QOL) and Zung depression scale score of the two groups were evaluated and compared.Results After four weeks of treatment,voiding difficulty endless,urinary urgency,perineal discomfort symptoms of the treatment group were improved significantly compared with the control group (x2 =23.563,18.348,15.874,all P < 0.05).After four weeks of treatment,QOL,Zung depression scale scores the treatment group were more significant decline than before treatment and the control group after treatment (t =0.554,0.615,0.382,0.336,all P < 0.05).Conclusion Antidepressant adjuvant therapy improves the psychiatric symptoms of CP patients,which can effectively improve the clinical efficacy of antibiotic therapy of CP. Key words: Prostatitis; Paroxetine