Roof light heat preservation and insulation composite board and preparation method thereof

The invention provides a roof light heat preservation and heat insulation composite board and a preparation method thereof, and relates to the field of new building materials, the roof light heat preservation and heat insulation composite board comprises a composite board body, a mold pressing plate and a mold, the composite board body comprises a surface layer and a structural layer, and the surface layer is prepared from, by weight, 740-800 parts of white cement, 100-150 parts of white silica fume, 100-150 parts of kaolin and 300-400 parts of 40-70-mesh sand; the invention relates to a transparent glass sand coating which comprises the following components in parts by weight: 600-700 parts of 20-40-mesh transparent glass sand, 5-6 parts of an emulsion, 4-5.5 parts of lithopone, 0.5-1 part of an aluminate coupling agent, 3-5 parts of a water reducing agent, 2-4 parts of a defoaming agent and 200-230 parts of water. The structural layer is prepared from the following raw materials in parts by weight: 740 to 8