The invention relates to a high-efficiency hot air combination machine. The high-efficiency hot air combination machine provided by the invention comprises a rack, a compression roller base, a hot airspraying base and an automatic conveying device; an upper conveying channel and a lower conveying channel for pearl wool to pass through are arranged inside the rack; the compression roller base is provided with upper compression rollers and lower compression rollers which are arranged horizontally; the upper compression rollers are arranged in parallel above the lower compression rollers; a combination channel capable of combining the pearl wool is formed between the upper compression rollers and the lower compression rollers; the combination channel communicates with both the upper conveying channel and the lower conveying channel; and the automatic conveying device is arranged at the front sides of the upper conveying channel and the lower conveying channel. The high-efficiency hot aircombination machine provided by the invention has the characteristics of realizing full-automatic regulation, high regulation efficiency and more precise regulation, preventing the pearl wool from being damaged by scalding, realizing automatic conveying, lowering the labor cost, realizing high conveying efficiency, realizing safety in operation and the like.