The rates of anastomotic bleeding in LS group and OS group were 9.3% and 4.5%,in colostomy and non-colostomy were 8.1% and 5.5%,and in AR group and LAR/UAR group were 3.3% and 12.1% respectively,there were no significant differences between them(P>0.05).

• LS组与OS组术后吻合口出血发生率分别为9.；3%25与4