One of the most important and influential factors in cartridge precipitators is the distribution of air flow. For this reason, we need to consider the wear at the inlet of the equipment. In the cartridge filter, the requirement of airflow distribution plate is usually strict, the airflow should be stable and uniform, so that the airflow can rise steadily and the dust can fall steadily. If the hole ratio of the air distribution plate of the cartridge filter is 35, then the resistance coefficient of the cartridge filter should be less than 2. It can be concluded that the gas distribution plate of the cartridge filter we use can meet the needs of the equipment when it is designed to be porous.