Abstract: Objective  To evaluate the clinical effect of modified Koyanagi technique and Duckett+Duplay technique in the treatment of proximal hypospadias. 
Methods  In this study, we searched Chinese and English databases and manually searched relevant journals. According to the inclusion and exclusion criteria, we searched by keywords to select the research that met the requirements. We used review manage 5.3 software to analyze the extracted data. 
Results  Five eligible studies were included in this study, including 227 patients with modified Koyanagi technique and 235 patients with Duckett+Duplay technique. The results of meta analysis showed the incidence of urethral fistula and operation time: there was no statistical difference between two groups. Incidence of urethral stricture: the incidence of urethral stricture after modified Koyanagi technique was relatively low(Z=3.01, P=0.003). Operation success rate: the operation success rate of modified Koyanagi technique was higher(Z=2.09, P=0.04). There was no significant difference in the incidence of urethra fistula between the modified Koyanagi technique and Duckett+Duplay technique with the “tennis racket” flap reconstruction of urethra plate; the incidence of urethra stenosis and the success rate of the modified Koyanagi technique were lower and higher. There was no significant difference in the incidence and success rate of urethra fistula and stricture between the modified Koyanagi technique and Duckett+Duplay technique. 
Conclusion  Compared with Duckett+dupaly technique, the modified Koyanagi technique has a lower incidence of urethral stricture and a higher success rate.

Key words: hypospadias； modified Koyanagi, surgical treatment, Meta analysis