本文介绍聚变实验装置——托卡马克装置的真空系统及在设计中考虑的若干问题。包括真空室器壁材料的选择、表面气体解吸率、为降低离子轰击感生解吸率的放电清洗方法;抽气系统泵组、密封结构、与就地钛层蒸镀方法等。文中着重指出,高能中性束注入所需要的大抽速低温抽气设备,及在装置中安排就地表面分析与诊断设备的重要性。 This article describes the fusion experiment device - tokamak vacuum system and some of the issues to consider in the design. Including vacuum chamber wall material selection, surface gas desorption rate, in order to reduce ion bombardment induced desorption rate of discharge cleaning method; pumping system pump group, seal structure, and on-site titanium layer evaporation method. The article highlights the importance of high-energy, neutral-beam injection of the high-velocity, low-temperature extraction equipment required for on-site surface analysis and diagnosis in installations.