The body pontoon and superstructure of US's air-cushioned landing craft (LCAC) are all made of welding aluminum. The characteristics of thin plate and relatively poor bulletproof capability result in the additional armor to protect the navigation room for the LCAC. As the weight of armor per unit area reduces greatly with the development of the light armor material, the armored area of LCAC will be enlarged to enhance the capability of the inward journey after shot. This paper systematically summarizes the development of the armor protection technique, and analyzes the inlfuence of the armor protection on the overall performance. It can provide reference for the development of LCAC in China.%美国气垫登陆艇(LCAC)的艇体浮箱及上层建筑均为焊接铝结构，板厚较薄，防弹能力较差，LCAC对驾驶舱等重要部位采用额外装甲进行防护。随着轻质装甲材料的发展，其单位面积质量大为减轻，LCAC将装甲防护范围进一步扩大，以增强中弹后的返航能力。文章系统介绍LCAC装甲防护技术的发展，并就装甲防护对总体性能的影响进行分析，也可为国内气垫船的技术发展提供借鉴。
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