The utility model provides a PVC (polyvinyl chloride) maintaining coating structure. The PVC maintaining coating structure includes a PVC bottom plate and a dual-component waterborne polyurethane maintaining layer covered on the PVC bottom plate; the dual-component waterborne polyurethane maintaining layer includes first and second coatings which are respectively coated on the surface of the PVC bottom plate one after another along the cross direction and the longitudinal direction. Compared with the prior art, through arranging two layers of dual-component waterborne polyurethane coatings (namely, the first and second coatings) on the PVC bottom plate, the PVC maintaining coating structure of the utility model improves the reliability of the floor, avoids troubles and unnecessary cost for frequently maintenance, and also improves the floor decorative property.