Abstract: In some hazardous environments of underground coal mines, mine robots have replaced manual labor to carry out dangerous or high-intensity operations.Due to the existence of strong magnetic field interference in underground coal mine, it will affect the stability and reliability of the robot's navigation system, communication system and electronic equipment.In order to avoid the inability of mine robots to work stably due to the influence of the magnetic field environment in underground coal mine, methods such as investigation and literature review were adopted to sort out the characteristics and variation laws of the earth's natural magnetic field, as well as the characteristics and distribution features of the complex and variable magnetic field environment underground.The main influencing factors of underground coal mine robots in the magnetic field environment were analyzed, and the countermeasures and technical means for each influencing factor were proposed, mainly including: anti-magnetic design and optimization measures; multi-modal fusion navigation strategy; signal processing and compensation algorithm; physical isolation and protection means.The research results can provide references for the development, design and processing of mine robots, with the expectation of promoting the technological level of mine robots in China to a higher level.