【摘要】 目的 探討淚囊鼻腔吻合術后復發的原因和手術方法。 方法 對1999年1月-2009年10月因淚道阻塞行淚囊鼻腔吻合術后3個月以上復發的47例患者，行再吻合術，術中仔細分離切除瘢痕及肉芽，盡量做雙瓣吻合。 結果 本組50只眼，術后隨訪3個月～2年，成功49只眼，1例再阻塞，治愈率98%。 結論 首次手術失敗的主要原因是骨孔過小，吻合口粘連，淚囊太小或萎縮，解剖層次不清和手術操作粗暴導致術中出血等。再次吻合手術治療效果滿意。【Abstract】 Objective To explore the reasons of recurrence and the operative method for re-blockage after dacryocystorhinostomy. Methods Forty-seven patients with dacryocystorhinostomy who were recurred after 3 months were included from January 1999 to October 2009. All patients underwent re-anastomosis. The operation required careful separation and resection of scar and granulation, and performed anastomosis with double valve as far as possible. Results All patients were followed up for three months to two years. Operations were successful in 49 eyes of total 50 eyes, and re-obstruction in one case with a cure rate of 98%. Conclusion The major reasons for the failure of the first operation include too small bone hole, anastomotic adhesions, too small or atrophy of lacrimal sac, unclear anatomy and surgical gross bleeding. The best treatment is surgical re-anastomosis.