The utility model discloses a dampproofing drainage structures of underground space, the power distribution box comprises a box body, be equipped with first baffle in the box, first baffle is separated for working chamber and inner circulation cavity in with the box, the working chamber is equipped with the second baffle, the second baffle is separated the working chamber and is suction draft zoneand dries the district, lower extreme one side of suction draft zone is equipped with the wash port, the wash port is fixed with first drain pipe, the lower extreme of first drain pipe extends to inthe header tank, the upper end of header tank is equipped with first opening. The utility model discloses a drainage and reach the problem that dry underground space is moist to the exchange of air need can not achieve the goal to underground space's large tracts of land transformation and solve basement poor ventilation, very easily goes mildy and reforms transform whole underground space when the undispersed surface decoration layer of making of humid air gathering is moist, the problem that wastes time and energy, simple structure, low in cost excellent in use effect, the suitable popularization.