The composite materials that can generally be used as tea bags are: PET/PE, BOPP/CPP, NY/PE, PET/VMPET/PE, OPP/AL/PE. These composite materials have excellent gas barrier properties, moisture resistance, and protection. The fragrance, anti-odor and other functions, and these protection of tea quality is very important. As we all know, tea is a dry product, it is very easy to absorb moisture and moisture and produce qualitative change. It has strong adsorption on moisture and odor, and the aroma is very volatile. Therefore, the tea packaging bag made of the above packaging material can well protect the quality of the tea.