Combined system floor system and construction method thereof

The invention discloses a combined system floor system and a construction method thereof, and belongs to the technical field of constructional engineering. According to the structure, a box body component is provided with an inter-ribbed beam, a plurality of sets of prestressed tendon components of a square structure are vertically arranged in the inter-ribbed beam, and upper-layer steel bars and bottom plate steel bars located over and under the prestressed tendon components penetrate through the prestressed steel bars. The prestressed rib components are additionally arranged in the rib beams of the box body components, so that the net-shaped rib beam structure with the I-shaped section in the floor can bear loads more effectively, and the performance of the floor is improved. The prestressing technology and the BDF hollow floor slab technology are combined, the advantages of the prestressing technology are fully exerted, the deflection of the BDF hollow floor slab is reduced, floor slab cracks are restraine