The shaft-type axial flow fan is suitable for ventilation and air exchange, or for enhancing heat dissipation in places such as metallurgy, chemical industry, light industry, food processing, and civil construction. If the housing is removed, it can also be used as a free-standing fan and can be installed in series at intervals in longer exhaust ducts to increase the air pressure within the pipes. It can be specifically used in workshops for metal processing, machinery, textiles, clothing, dyeing, shoe-making, plastics, injection molding, die casting, heat treatment, casting, glass products, spraying, electroplating, electronics, chemicals, metallurgy, leather, toys, and home appliance manufacturing.