Abstract: In order to study the early warning criteria for water inrush from coal mining, research and develop the water hazard monitoring and early warning technology, using mine hydrogeological analysis, mechanical analysis, geophysical exploration and other technical means, the mine floor water inrush symptoms were analyzed, a monitoring index system was established, water damage warning was studied, the layout method of water damage warning system was studied, and the qualitative warning criteria and quantitative early warning criteria for mine floor water inrush were put forward, the floor water damage warning system was developed. The real-time monitoring and inversion method of floor damage depth under mining influence was discussed. Finally, taking the 11603 working face of Xuchang Mine as an example, the water damage warning system was arranged, and the monitoring and early warning of water inrush from the floor was implemented. The research shows that the water damage warning system can monitor the coal seam floor warning indicators in real time, invert the mechanical deformation and damage of the rock mass, and and together with the early warning criteria, realize the monitoring and early warning of coal mine floor water inrush.