The high-efficiency purification dust removal box is equipped with a plasma air purification unit, a primary filter screen, and a catalytic high-efficiency purification screen. This machine is used in conjunction with a bidirectional flow fresh air fan and a total heat exchange fresh air fan. Due to the characteristic of one-time air intake in the fresh air system, the requirement for one-time purification efficiency is extremely high. This machine adopts our company's newly developed honeycomb type narrow spacing electric field, with a one-time dust removal efficiency of up to 99%, far superior to similar products. Connected in series with the front section of the fresh air fan, the outdoor unclean air first enters the purifier. Under the triple action of the primary filter, electric field, and catalytic net, the outdoor PM2.5 and other particulate matter, pollen, industrial waste gas, odors, etc. are intercepted and decomposed, and fresh air is continuously sent into the room.