Compared with household vacuum cleaners, battery powered cordless industrial vacuum cleaner has the advantages of continuous use for 24 hours, strong suction, large dust storage capacity, long service life and high temperature resistance. The dust extraction units for sale outer casing and trash can are made of steel or iron with the thickness. The board can effectively protect the motor part from damage. In particular, industrial vacuum cleaners have almost no requirements for suction, and waste materials of various materials and shapes can be sucked. By replacing different filter media, such as filter cartridges, filter bags, etc., it can absorb solid particles of 0.3 micron or more with an accuracy of 99%, which is suitable for industries such as fine chemicals and precision machinery.