在对典型“联盟式”返回舱座椅局部改进的基础上，建立了能够吸收水平着陆冲击能量的水平缓冲杆支撑座椅模型。基于胀环式缓冲杆的缓冲原理和工作特性，定义了典型、极限水平着陆工况和水平缓冲杆设计要求；应用三部分设计方案和优化选择程序，分别设计了各段胀环长度相等和不相等的水平缓冲杆。座椅实例设计结果表明，综合了着陆工况、缓冲原理、工作特性和优化效率各个影响因素的设计方法，具有统一、全面和高效的特点；优化的水平缓冲杆支撑座椅，实现了同时缓冲头盆向和胸背向过载、适应更宽着陆工况的目的。

On the base of local improvement for the typical “TMA” buffer seat, the cushion pole support buffer seat model is set up with the goal to absorb the horizontal landing shock energy. The definitions for the typical horizontal landing condition, limit horizontal landing condition and design requirements of the horizontal cushion pole are founded on the buffer principle and working characteristics. Three-segment schemes and optimization codes are applied during the design process for the horizontal cushion pole, made of equidistant and non-equidstant expandable ring. Numerical simulations of the seat design demonstrate that the cushion pole support buffer seat alleviates the head-pelvis and chest-back excessive load. The design mehtodology is uniform, comprehensive and efficient. It includes the landing conditions, buffer principles and working characteris. The potential design methodology makes the buffer seat satisfy more landing conditions.