Laminar flow cabinet is a box-type air purification equipment that can provide local dust-free clean, sterile working environment class 100 (ISO Class 5) local operating environment. The polluted air in the working area can be artificially controlled through a special filter channel to avoid harm to people and the environment. In the working state, it can keep the performance parameters such as wind speed, air cleanliness, noise, vibration and lighting in the working space to meet the requirements of laboratory use, and is widely used in biological laboratories, medical and health and other related industries, which has a good effect on improving the process conditions, protecting the health of the operator, and improving product quality and yield.