Clean bench, also known as clean bench, is designed to meet the needs of local working area cleanliness in modern industry, photoelectric industry, biopharmaceuticals and scientific research experiments. The air is sucked into the pre-filter through the fan, and enters the high-efficiency filter through the static pressure box for filtration, and the filtered air is sent out in the state of vertical or horizontal airflow, so that the operation area reaches the 100-level cleanliness and ensures the environmental cleanliness requirements of production.