Blocking layer for packaging, sheet-shaped composite layer for packaging and packaging container of sheet-shaped composite layer

The invention provides a barrier layer for packaging, a sheet-shaped composite layer and a packaging container with the sheet-shaped composite layer. The barrier layer for packaging does not include a metal layer and includes a base layer and a first barrier layer disposed on top of the base layer. The matrix layer mainly comprises a matrix layer mixture comprising at least two matrix layer polymers. The first barrier layer includes a metal oxide. The at least two matrix layer polymers comprise a first matrix layer polymer and a second matrix layer polymer, and the first matrix layer polymer and the second matrix layer polymer are different, so that the barrier layer for packaging has at least two melting point peaks. Therefore, when the packaging container is sealed, due to the existence of a plurality of melting point peak values, the first matrix layer polymer and the second matrix layer polymer can respectively enter a molten state, and the blocking layer is prevented from generating a bubble phenomenon.