Laminar Flow Hood is an air purification device that can provide local high cleanliness. It uses fans and high-efficiency filters to purify dust particles in the airflow, and after the clean airflow passes through the flow-equalizing membrane, it is evenly transported to the coverage area of the laminar flow hood, thereby improving the cleanliness of the area and protecting the production and operating environment and material safety of the area. It can be used in pharmaceutical factories, laboratories, production lines in clean workshops and other places where local cleaning is required to reach Class 100.