Abstract: The present invention provides an elastic plastic layer that is moisture proof and sound insulation and its production method. The elastic plastic layer that is moisture proof and sound insulation comprises a wear resistant layer, a decoration layer, a first backing material layer and a moisture proof and sound insulation layer. The adjacent layers are connected in turn by the order. The present invention provides the floor that is not only with the function of sound insulation, sound absorption, moisture proof, heat preservation, slightly flipping feet, resistance to press, acid and alkali resistance, but also with the positive effect that is low cost, easy molding, good in mechanical properties, and it is also good in laying effect, inflaming retarding, anti-skidding, easily laying, except that, since the wear resistant layer of the floor is coated with the ultraviolet-curable coating, so that it further improves the scratch-resistant property of the floor.