Abstract: In the complex geographic environment, the irregular terrain and diversified ground surface cover will cause a greater impact on electric wave propagation. With a view that the electromagnetic modeling focusing on the digital elevation model lacks the information about ground surface cover, the paper studies the modeling in geographic electromagnetic environment based on LiDAR point cloud. It processes the LiDAR point cloud data with grid transformation using the mathematical morphological method, successively extracts information about ground objects and terrain from the point cloud data, then gives various ground objects the matched electromagnetic parameters, obtains a more accurate model in the geographic electromagnetic environment, and makes a simulation analysis of the characteristics of electric wave propagation in the environment of real ground surface cover through the parabolic equation model. Compared with the traditional electromagnetic modeling based on digital elevation model, the proposed modeling method can obtain the information of terrain and ground features, can more comprehensively consider the impact of ground objects on the characteristics of electric wave propagation, and thus the prediction results are more accurate and effective.