目的　分析Dixon术应用器械吻合术后吻合口漏的原因。方法　通过对本院近年来 2 46例中上段直肠癌施行Dixon术应用器械吻合出现吻合口漏的各种原因进行分析比较。结果　病灶距肛门≤ 8cm组和吻合二次以上者吻合口漏发生率较高 ,差异有显著性意义和高度显著性意义。结论　认为吻合口漏的发生与以下原因有关 :①手术适应证掌握不当 ;②器械操作不够熟练 ;③吻合口张力过大 ;④吻合口血供不良 ;⑤术前肠道准备不完善和术中污染。 Objective To analyze the causes of anastomotic leakage after Dixon operation. Methods In our hospital in recent years, 466 cases of upper rectal cancer Dixon operation with anastomotic leakage of anastomotic leakage causes were analyzed and compared. Results The incidence of anastomotic leakage was higher in patients with anus ≤ 8 cm anastomosis and secondary anastomosis, the difference was significant and highly significant. The conclusion is that the occurrence of anastomotic leakage is related to the following reasons: (1) the surgical indication is not properly mastered; (2) the operation of the instrument is not proficient; (3) the anastomotic tension is too large; (4) the anastomotic blood supply is poor; (5) Pollution.