In the construction of railway engineering,subgrade filling construction is one of the key links,and the high-quality construction of this link is conducive to improving the overall quality of railway engineering.In this paper,the quality management of railway subgrade filling construction is analyzed and studied in combination with the subgrade widening project of Yongkang South Station of Jintai Railway,and the significance,common quality problems and preventive measures of railway subgrade filling construction quality management are put forward in the process of research,so as to complete the management of subgrade filling construction quality from the whole to the details.