本文主要例举了国产机床普遍存在的精度保持性差、使用寿命短的质量问题，并从设计和工艺等方面提出了一些提高机床精度保持性和延长使用寿命的意见。可以设想，如果把机床产品的使用寿命从现在的水平提高一倍，那将会产生多么巨大的经济效果。这个问题是应该引起认真思考和讨论的。 This paper mainly illustrates the quality problems of poor precision retention and short service life which are common in domestic machine tools. Some suggestions are put forward to improve the maintainability and extend the service life of machine tools from the aspects of design and technology. Imagine the tremendous economic impact that can be achieved by doubling the life of a machine tool product from what it is now. This question should arouse serious consideration and discussion.