Underground water-sealed cavern seawater intrusion visualization device and monitoring method and device thereof

The invention discloses an underground water-sealed cavern seawater intrusion visualization device and a monitoring method and device thereof, relates to the technical field of test simulation devices, and aims to simulate a seawater intrusion process during excavation and operation of an underground water-sealed cavern. The device comprises a box body and a cavity, the device further comprises two controllable permeable isolation assemblies located in the box body, the two controllable permeable isolation assemblies divide the box body into two supply chambers and a geological environment simulation chamber, the cavern is located in the geological environment simulation chamber, and the two supply chambers comprise a fresh water supply chamber and a seawater supply chamber; the cavern comprises a multi-hole body and release type shielding films, and when the cavern body is in a non-excavation state, the release type shielding films are formed on the surface, close to each supply chamber, of the multi-hole bo