本文报告经手术及病理检查证实的胃肠道原发恶性淋巴瘤２０例，对其中１３例行内镜检查者作了较细致观察与记录。肿瘤形态呈隆起型４例，溃疡型５例，局部浸润型１例，弥漫型３例。内镜确诊率为１５．４％，确诊加疑诊率为５３．８％。文中重点讨论了本病胃镜、肠镜的表现特点及活检取材的方法，提出了早期诊断的必要性和可能性。 This article reports 20 cases of primary malignant lymphomas of the gastrointestinal tract confirmed by surgery and pathological examination. 13 cases of endoscopic examination were carefully observed and recorded. The tumors showed 4 cases of uplift type, 5 cases of ulcer type, 1 case of local infiltration type and 3 cases of diffuse type. The endoscopic diagnosis rate was 15.4%, and the diagnosis plus diagnosis rate was 53.8%. This article focuses on the gastroscope, colonoscopy performance characteristics and biopsy methods, and put forward the necessity and possibility of early diagnosis.