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KRAS突变是非小细胞肺癌（NSCLC）最为常见的驱动基因突变之一。KRAS突变NSCLC具有高度异质性，多种突变亚型和不同共突变特征均影响其生物学行为和治疗应答。KRAS突变NSCLC是免疫治疗相对获益人群，而KRAS突变对化疗存在的影响仍存有争议。KRAS突变肺癌多年来遵循无驱动基因突变NSCLC的治疗方案。随着KRASn G12C抑制剂的问世，该人群的靶向治疗已取得初步进展，联合治疗的效果在临床前和早期临床研究中初见成效。现就KRAS突变NSCLC的生物学和临床特征及治疗研究进展进行综述。n “,”KRAS mutation is one of the most frequent driver gene mutations found in patients with non-small cell lung cancer (NSCLC). KRAS-mutant NSCLC is highly heterogeneous. Various mutation types and different co-mutational signatures affect tumor biological behavior and therapeutic responses. NSCLC patients with KRAS mutations could relatively benefit from immunotherapy, while the effects of KRAS mutations on chemotherapy are still controversial. The treatment methods of KRAS-mutant lung cancer have followed the therapy of NSCLC without driver gene mutation for a long time. With the introduction of novel KRASn G12C inhibitors in the clinic, the therapeutic landscape has begun to change and has made the preliminary advance, and the combined therapies resulted in encouraging signals of efficacy both in preclinical and early phase trials. This paper reviews the biological and clinical characteristics as well as the latest treatment progress of KRAS-mutant NSCLC.n