Underground wet connector

The underground wet connector comprises an outer cylinder and a plug, and the outer cylinder comprises a locking sleeve, a body, an isolation sleeve, a first spring sliding sleeve and a cable plug; and the plug comprises a mandrel, an upper joint, a locking mechanism, a contact seat, a second spring sliding sleeve and a baffle ring. According to the invention, a cable communication mode and a hydraulic channel communication mode are provided for connection of the upper pipe column and the lower pipe column, and by means of part of the structure, two different tools including an underground cable connector and an underground hydraulic connector can be expanded; by means of the effective implementation of the device, when the upper pipe column is pulled out, the lower pipe column does not move, meanwhile, effective connection of the upper pipe column and the lower pipe column is guaranteed when the upper pipe column is tripped in again, the operation efficiency is improved, and the operation cost is reduced. 本发