本文通过４５０例胃癌的临床病理分析，发现淋巴结转移与肿块大小，浸润深度、大体类型、组织学类型均有相关性，其中浸润深度为最重要因素，并从淋巴系统解剖学角度加以解释、探讨，同时建议早期癌可清扫至第一级；进展期癌＜４ｃｍ，浸润肌层可清扫至第二级；＞４ｃｍ，浸润全层可清扫至第三级。 In this paper, the clinical pathological analysis of 450 cases of gastric cancer found that lymph node metastasis was related to the size of the tumor, depth of invasion, general type, and histological type. The depth of invasion was the most important factor, and was interpreted and discussed from the perspective of lymphatic system anatomy. , At the same time, it is recommended that early cancer can be cleared to the first level; advanced cancer is <4cm, and the infiltrating muscle layer can be cleaned to the second grade; >4cm, the infiltrated whole layer can be cleaned to the third grade.