The invention discloses an anti-bending reinforcing structure for prefabricated hollow floors and a construction method of the anti-bending reinforcing structure. The anti-bending reinforcing structure comprises core grouting reinforcing structures for prefabricated hollow floor holes and suspension reinforcing structures for prestressed steel wire ropes. The core grouting reinforcing structures for the prefabricated hollow floor holes comprise the hollow floor holes, grouting hole channels, through rebars and grouting materials. The suspension reinforcing structures for the prestressed steel wire ropes comprise anchorage device systems, reserved pipelines and the prestressed steel wire ropes, the reserved pipelines are arranged in the grouting materials in the first prefabricated hollow floors, the prestressed steel wire ropes are arranged at the bottoms of the second prefabricated hollow floors, and the two ends of the prestressed steel wire ropes penetrate through the reserved pipelines of the first prefabricated hollow floors on the two sides of the corresponding second prefabricated hollow floors and are anchored through the anchorage device systems. According to the structure, the problem of insufficient bearing capacity of the prefabricated hollow floors can be effectively solved, and the integrality, the bearing capacity and shock resistance between the prefabricated hollow floors are further improved.