Sound insulation composite floorboard with reduced generation of interlayer noise and its manufacturing method

The present invention relates to a sound-insulating composite flooring plate that reduces the occurrence of inter-layer noise so as to form a buffer layer on the surface of the floorboard to absorb the primary impact applied to the floorboard and block noise generated while hitting the surface in advance. As a polyvinyl chloride sheet manufacturing step; Polyvinyl chloride sheet manufacturing step for the surface material; A vinyl sheet lamination step; Forming a composite polyvinyl chloride sheet; A step of forming a melamine makeup plate; Plywood completion step; The intermediate shock absorber construction step; Forming a surface shock absorbing layer; Forming a sound absorbing layer; A waterproof layer forming step of joining a plate of ethylene vinyl acetate board having a flat plate to serve as a sound absorbing role that serves as a waterproof layer on the bottom surface of the plywood on which the sound absorbing layer is formed， or an ethylene vinyl acetate board layer forming step; A 5-ply plywood layer forming step; A sound-absorbing layer type forming step of ethylene vinyl acetate foam board; A step of forming a decorative plate; The surface shock absorbing layer forming step of the polyvinyl chloride composite sheet can be sequentially performed from the bottom， or the ethylene vinyl acetate adhesive applied on the ethylene vinyl acetate foam board rises through the hole so that it can be fused with the phenolic resin adhesive of the melamine veneer. Curing and bonding for about 2 hours; A step of laminating a polyvinyl chloride sheet after applying a UV adhesive on the melamine veneer， laminating a polyvinyl chloride sheet after applying a UV adhesive on the polyvinyl chloride sheet， and then bonding by irradiating with ultraviolet rays; Applying a urethane coating solution on a polyvinyl chloride sheet at 40um to cure at 60 to 80 for 30 to 60 seconds to complete the final step of completing the polyvinyl chloride composite sheet to 0.6 to 1mm. Conducting a method for manufacturing a sound-insulating composite floorboard with reduced generation of inter-layer noise， the ethylene vinyl acetate board layer from below; A 5-ply plywood layer; A sound absorbing layer made of ethylene vinyl acetate foam board; A melamine veneer layer; The present invention relates to a sound-insulating composite floorboard that reduces the occurrence of interlayer noise composed of a surface impact absorbing layer made of a polyvinyl chloride composite sheet.