Novel leakage-proof mechanism for underground diaphragm wall communicating channel

The utility model relates to a novel leakage-proof mechanism for an underground continuous wall communicating channel, which comprises an underground continuous wall body, a basement main body structure is poured on one side of the underground continuous wall body, and a water stop steel plate is placed on one side, close to the basement main body structure, of a reinforcement cage in the underground continuous wall body. An extruded sheet facilitating later grooving is installed on the outer side of the water stop steel plate, and a supporting steel plate is installed at one end of the water stop steel plate. A water stop steel plate is placed at the position of a reinforcement cage in an underground continuous wall, the position of the water stop steel plate is filled with an extruded sheet, then the position of the reinforcement cage can be poured, in the construction stage of a basement main body structure, the extruded sheet is chiseled away, the extruded sheet and the exposed water stop steel plate are