The postoperative recurrence of Crohn's diseases (CD) remains high. Stapled anti-mesenteric functional end-to-end anastomosis was safe for CD patients. Its impact on the postoperative recurrence of CD was unknown. Whether it is superior than the conventional anastomosis (stapled antimesenteric isoperistaltic side-to-side anastomosis) needs explored. The trial aims to compare the different impacts of the two antimesenteric anastomosis configurations on the anastomotic recurrence following bowel resection.

Inclusion Criteria:

• patients with Crohn's disease needing bowel resection and anastomosis;
• ileocolic anastomosis；
• written consent acquired

Exclusion Criteria:

• patients underwent enterostomy;
• small bowel anastomosis;
• anticipating other trial.