Corrugated kraft envelope bag is a new product of envelope express industry, which can be recycled and reused. This equipment is the latest equipment of corrugated kraft envelope bag developed from bubble film envelope bag equipment, aiming at the corrugated kraft envelope bag market in Europe, America and China, and can replace ordinary kraft envelope bag. This product is a kind of pressure-resistant, shockproof and fall-proof envelope bag. Can replace the ordinary envelope bag market.