Waterproof sealing structure installed for external sun shading of passive ultralow-energy-consumption building

The invention provides a waterproof sealing structure installed for external sun shading of a passive ultralow-energy-consumption building. The waterproof sealing structure comprises a roller blind box, wherein the roller blind box is installed in an external heat insulation layer above a window, the external heat insulation layer at the contact position of the upper surface of the roller blind box is provided with a through groove with an opening facing the outside, the upper surface of the roller blind box is arranged on one side of the through groove, a water dropping line is laid on the surface of the external heat insulation layer above the other side, a tubular motor is arranged in the roller blind box and is connected with a power line, the power line penetrates through the externalheat insulation layer and a wall body through a spool, a wire box is installed at an outlet of the spool, the spool is filled with a polyurethane foaming agent and is sealed, and a waterproof and breathable film is arranged