Abstract: Geological disasters caused by rainstorm are characterized with suddenly happening. Rainfall is the triggering factor of geological disasters, therefore, disaster warning and prediction according to rainfall can greatly reduce the loss of geological disasters. Based on the geological disaster susceptibility zoning of collapse, landslide and debris flow in Ji’an County, this paper researched meteorological early warning model of Ji’an County geological disaster by using the explicit statistical model and analyzing the relation between historical geological disasters and daily rainfall. When the daily rainfall reaches 50 mm, 70 mm, 110 mm, 160 mm, respectively, different levels of collapse, landslide and debris flow prone areas would come into corresponding geological disaster warning state. The research on Ji’an meteorological early warning zoning filled the blank of meteorological early warning of geological disaster in the county, and provided quantitative indicators for geological disaster warning decision-making.