Abstract: The resistance characteristics of the inline counterflow column type wind caps during the operation of suspension roaster was systematically investigated based on the bed pressure drop-air flow method. The influences of air flow and numbers of small holes in the core cap tube on the resistance characteristics of the air distribution device with embedded counter-current column type wind caps were explored by cold tests, and the resistance characteristics of the embedded counter-current column type wind caps under different temperature conditions were deduced according to similar theory. The results showed that the resistance of the air distribution device with embedded counterflow column type wind caps decreased with the increase of the number of wind caps and the number of small holes of the wind cap core tube. The critical airflow increased with the increase of ore particle size while having a small influence on the ore bed height. The research results provide theoretical and data support for the design and optimization of operating parameters in the industrial production of suspension roasting.