Objective To analyze the effect of improved Snodgrass surgery in the treatment of 48 cases of children with hypospadias. Methods A total of 48 cases of 1-12 years old children with hypospadias in our hospital from Sep. 2014 to Sep. 2015 were taken as the clinical research objects. Among them, 30 cases were first diagnosed, the other 18 cases were postoperative urethral rupture children. All of them were given improved Snodgrass surgery, and their clinical effects and complications were compared. Results The success rate of operation was 89.58%, the mean operative time was (78.36±11.35)min, the occurrence rate of postoperative urinary fistula, urethral stricture and complication were respectively 6.25%, 4.17% and 10.42%, the difference in the operation time between the first diagnosed children and the children who underwent surgical treatment was significant(P<0.05), but there were no significant differences in success rate and occurrence rate of complication(P>0.05). Conclusion Improved Snodgrass surgery which is simple, effective, and suitable for mild and moderate cases of lower curvature of the penis, can be used to correct first diagnosed and most postoperative hypospadias.