本文报告７０岁以上高龄大肠癌４９例，占同期收治大肠癌的９．２％。临床表现以便血为主，占７３．５％；以急性肠梗阻就诊者占２２．５％。直肠癌占７９．５％，８１．６％的病例合并一种以上其它系统疾病，本组误诊３１例，误诊率６３．３％。进行根治性切除术２５例，其它姑息手术２４例。随访４２例，死于术后并发病者７例（占１６．７％），生存１～３年者２３例（５４．８％），生存５年者３例（７．１％）。着重讨论了高龄大肠癌的临床持点、早期诊断和治疗原则。 This article reports 49 cases of over 70 years of age with colorectal cancer, accounting for 9.2% of colorectal cancers treated during the same period. The clinical manifestations were blood-based, accounting for 73.5%; patients with acute intestinal obstruction accounted for 22.5%. Rectal cancer accounted for 79.5%, 81.6% of cases combined with more than one other system disease, this group misdiagnosed 31 cases, misdiagnosis rate was 63.3%. Radical resection was performed in 25 cases and other palliative operations in 24 cases. A total of 42 patients were followed up, and 7 patients (16.7%) died of postoperative complications, 23 (54.8%) survived 1 to 3 years, and 3 (7.1%) survived 5 years. Focuses on the clinical point of care, early diagnosis and treatment of advanced colon cancer.