Abstract: A satisfactory result was obtained by using “Z” shaped anastomosis in treating 132 petients with Hirschsprung's disease from 1973 to 1994 The modified Duhame procedure eliminated completely the septum between the rectum and colon, This procedure was easy to manipulate and didn't meed any anal dilatation after operation, No perioperative death ws found. All patients hadnormal anal oppearance and defecation and no incontinence or constipation during the follow up period from 1 to 22 years Our experiences suggest the main factors to prevent postoperative occurrence or complication are: （1）adeguate resection of the colonic segments containing the proximel aganglionic or degenerated ganglion ic tissues; （2）enough mobilijation the drawn doun colon but without any tension; （3）minimal abdominal contamination and careful prevention of postoperative in fection and （4） a good instrument orush champ to perform a successful Z shaped anastomosis