本文以丰富的工程实例说明我国近10年来铁路工程所取得的巨大的技术进步和明显的技术经济效益。改革开放为我国铁路建设创造了有利的外部环境和内部条件。再次证明了“科学技术必须面向经济建设,经济建设必须依靠科学技术”这一方针的正确性。 In this paper, abundant engineering examples are given to illustrate the tremendous technological progress and obvious technical and economic benefits that railway projects have made in the past 10 years in our country. Reform and opening up have created favorable external environment and internal conditions for the construction of our country’s railway. This proves again the correctness of the principle that “science and technology must be oriented toward economic construction and economic construction must rely on science and technology.”