The current situation of surface enhancement process for the sphere was analysed in this paper. Aiming at the cryogenic ball valve which was used proverbially in aerospace, it put forward a new rolling process method for the sphere surface. And the process parameters including the sphere surface roughness, rolling speed and rolling pressure were calculated.%分析了目前球体表面硬化加工技术的发展现状，针对航天领域内广泛采用的低温球阀，提出了一种新的球体表面滚压硬化的工艺方法，并对该工艺所加工的球体表面粗糙度、滚压速度以及滚压力等工艺参数进行了分析计算。
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