Abstract: The present invention is directed to a connecting structure of a cover plate for a network floor. The floor supports or floor plate bodies for the network floor are integrally formed with a hollow portion, a frame rim portion, and a central pillar on the center portion the floor supports or floor plate bodies. Locking rims are provided on the periphery of the cover plate which engage with grooves provided in the frame rim portion of the floor supports or in the floor plate bodies. Long side covers are also provided and have rim portions extending downward on the long sides thereof. The rim portions of the long side covers also engage the grooves of the frame rim portion of the floor supports or the floor plate bodies. In addition, a central cover is provided that has locking rims which engage grooves of the two adjacent floor supports or floor plate bodies. The assembled structure has improved strength that prevents the network floor from sliding or deforming.