Abstract: The external safety environment of railways has become one of the main risks affecting railway operation safety. Conducting dynamic monitoring of railway environmental safety can effectively address the aforementioned risks, and is of great significance for preventing potential emergencies and ensuring safe railway operation. In order to improve the effectiveness of dynamic monitoring methods for railway environmental safety, the author conducte research on dynamic monitoring of railway environmental safety based on new remote sensing technologies. Firstly, the external safety environment of the railway is analyzed. Then the characteristics of various remote sensing monitoring technologies and the advantages and disadvantages of their application in dynamic monitoring of railway environmental safety are compared. Finally, the monitoring and evaluation of geological disasters along the railway, monitoring of railway land occupation, and a dynamic monitoring plan has been designed for typical hidden dangers such as illegal mining on overlying railways, and experimental testing has been conducted. Special issues that arise during the testing period have been specifically addressed. The experimental results indicate that the combination of multiple technologies and complementary advantages can achieve dynamic monitoring of railway environmental safety, effectively improve the level of railway safety and environmental management, and provide certain technical support for railway environmental disaster prevention and emergency response.

Key words: railway environmental safety, remote sensing technology, GIS, dynamic monitoring, experimental research