Water self-supply system for deeply-excavated cavern of mountain

The invention discloses a water self-supply system for a deeply-excavated cavern of a mountain. In the system, an underground water diversion monitoring module is connected with an underground water storage and supply module through a water collecting pipe, the underground water storage and supply module is connected with an underground water guide and drainage module through a drainage pipe, and a water pressure gauge, a valve, a conductivity meter and a water flow meter are arranged on the water collecting pipe from a water collecting ball to the underground water storage and supply module. A water collecting conduit water filter and a valve are arranged on the water collecting pipe between the underground water diversion monitoring module and the water inlet connecting pipe, the water inlet connecting pipe is communicated with the water storage tank, a vent valve, a drain valve, a water supply valve and a slag discharge valve are arranged on the side wall of the water storage tank, and a drain pipe water f