The dry spray booth using cardboard paint overspray separation module as paint overspray filtering media is a low-carbon and green coating technology that has been widely used in domestic automobile factories.The commonly used cardboard paint overspray separation module structure on the market currently has various defects and cannot meet the needs of the latest dry spray booth system.This article mainly describes the development process of a new structure,high paint hold capacity and high filtration efficiency cardboard paint overspray separation module,and the test results show that this cardboard paint overspray separation module fully meets the design specifications.