Abstract: Based on the collecting data and consulting documents, by understanding the development of the application of geophysical technical methods and the evaluation methods of the stability of ground collapse, this paper analyzes the feasibility of using highprecision electromagnetic frequency spectrum method to explore the stability of the ground collapse in goaf areas of coal mine. Taking the Liaoyuan coal mine as an example, this paper establishes a foundation for the processing and interpretation of geophysical signals through the combination of countryside exploring and researching indoor. Furthermore, this paper investigates the theory method of using geophysical technical to explore the stability of the ground collapse in goaf areas and analyzes the stability of ground collapse in the Liaoyuan goaf of coal mine. This paper offers a kind of train of thought and method for the evaluation of subsidence stability. It is of certain practical value for the restoration, reasonable development and utilization of the ground subsidence.