Suspension type suspended ceiling under large-space steel structure daylighting roof

The invention relates to a suspension type suspended ceiling under a large-space steel structure daylighting roof. The suspended ceiling system comprises a daylighting roof steel frame and a daylighting roof which are arranged at an opening in the top of a building body, a steel structure ring beam located below the daylighting roof steel frame is fixed to the opening in the top of the building body, and a suspended ceiling is hung below the steel structure ring beam through a plurality of hanging rods. The suspension type suspended ceiling comprises a grid steel frame, a supporting face device and a soft film lighting device. After assembly, when the LED light source is in a closed state, outdoor natural light sequentially penetrates through the daylighting roof, the perforated honeycomb aluminum plate, the steel mesh, the middle transparent film and the bottom light-transmitting film to be projected into a room; when the LED light source is turned on, LED light penetrates through the middle transparent film