Composite floor structure

The utility model discloses a composite floor structure which comprises an external splicing mechanism, a heat insulation and corrosion prevention mechanism and an internal bearing mechanism, the heat insulation and corrosion prevention mechanism is attached to the interior of the external splicing mechanism, and the internal bearing mechanism is arranged on the periphery of the interior of the external splicing mechanism. According to the composite floor structure, the floor is divided into five layers, the first layer is a PVC layer and calcium carbonate, the second layer and the fourth layer are attached through a nylon net, the third layer and the fifth layer are also made of PVC layers and calcium carbonate, an overall PVC structure is formed through overall dry powder calendaring, the PVC layers play a filling role through calcium carbonate evenly distributed along the periphery of the interior, and the PVC layers play a filling role through calcium carbonate evenly distributed along the periphery of th