Abstract: From July 29 to August 2 in 2023, Mentougou District in Beijing City encountered extreme heavy rainfall, which induced geological disasters such as hilly collapse, landslide, debris flow and ground collapse. Based on the results of post-disaster investigation, the characteristics of geological disasters in Mentougou district are obtained, the distribution relationship between geological disaster events and elevation, topographic fluctuation, slope aspect, stratigraphic lithology and fault structure is analyzed, and the relationship between geological disaster events and rainfall is discussed. The analysis results show that the geological disasters induced by the "23·7"extraordinarily heavy rainstorm have the characteristics of strong group occurrence, multiple types, small scale, multiple types of threat objects and serious disasters, geological hazards are more developed in the 0～800 m elevation range, 50～200 m topographic relief section, and eastward to southwestward slopes; geological hazards are most developed in the Jurassic strata, accounting for 42.64% of the total number of disaster events; The number of geologic hazards is positively correlated with rainfall, and the greater the rainfall, the stronger the degree of occurrence of geological hazards, and the rainfall intensity is the key factor affecting the occurrence of geological hazards.