超级微创阶梯式全层切除术(sft-SMIR)是在超级微创手术(SMIS)理念指导下发展起来的一种新型内镜术式。该术式通过"双圈标记、阶梯切除、边切边缝、肌层闭合"的技术流程，实现早期胃癌的整块切除及胃壁解剖结构最大程度保留。本规范基于前期临床研究结果，全面介绍早期胃癌sft-SMIR的适应证、禁忌证、术前评估、手术操作标准、术后管理及疗效评价体系，旨在推动该技术标准化和规范化应用，为临床实践提供指导。

Super minimally invasive stepwise full-thickness resection (sft-SMIR) is a novel endoscopic technique developed under the guidance of the super minimally invasive surgery concept.This procedure follows a technical sequence of 'double marking, stepwise resection, suturing while resecting, and muscle layer closure’ to achieve en bloc resection of early gastric cancer while maximally preserving the gastric wall anatomy.Based on preliminary clinical research findings, this specification comprehensively introduces the indications, contraindications, preoperative evaluation, standardized surgical procedures, postoperative management, and efficacy evaluation system for sft-SMIR in early gastric cancer.It aims to promote the standardized application of this technique and provide guidance for clinical practice.