Based on statistical analysis of known geological hazard points,this paper summarized thedevelopment characteristics and laws of abrupt geological hazards in northern mountainous area ofTianjin.The relationships between abrupt geological hazards and topography and geomorphology,for-mation lithology,geological structure,rainfall,human engineering activity,etc,were studied.Theresults could provide the scientific basis for disaster prevention and mitigation for government depart-menu and city’s public safety services.