Leakage-proof double-layer composite paper-plastic box and production equipment and production method thereof

The leakproof double-layer composite paper-plastic box comprises a bottom box with a cavity, a hot-pressing layer is arranged in the cavity, and a leakproof film covering layer is arranged on the surface of the hot-pressing layer; the hot-pressing layer is of a plate-shaped structure; or the hot pressing layer is a box-shaped inner container; when the hot-pressing layer is of a plate-shaped structure, the hot-pressing layer is in hot-pressing connection with the peripheral annular area of the bottom of the bottom box to form sealed connection; the film covering layer is located on the upper surface of the hot pressing layer and is a degradable organic film covering layer. The plate-shaped or box-packed inner container is coated with the organic degradable film, so that water/oil permeation prevention is achieved, the degradation time is short under the natural condition, and environmental protection is facilitated; the film covering area is minimized through hot pressing, a compact layer is formed on the bott