Through the application example of slag filling subgrade in Xin-Hei railway renovation project, the paper carries out slag material test, recognizes its properties, discusses the construction points and quality control, and finally points out that slag filling subgrade has social and eco- nomic .benefit, which is worth promoting.%通过忻黑线改建应用矿渣填筑路基的工程实例,对矿渣进行了材料试验,认识了其性质,并对施工要点、质量控制进行了论述,最后指出利用矿渣填筑路基社会效益和经济效益显著,值得推广。
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