Introduction  In order to optimize the typical design scheme of flue gas， air and pulverized coal pipeline， which had been applied in many projects， this paper planned to verify the implementation effect before and after the design optimization， so as to further improve the typical optimization scheme system for verification.

  Method  Taking a specific project as an example， this paper adopted the research method of comparing the absolute value and difference between the theoretical calculated value and the actual test value， and carried out a comparative study on the theoretical pressure drop and the field test value about air and flue gas duct as well as pulverized coal pipe.

  Result  The results showed that the optimization effect of theoretical calculation was inferior to the measured one.

  Conclusion  The optimization scheme was beneficial to reduce the resistance level of the whole pipe system， so it will make the actual implementation effect due to the theoretical calculation value. The research results of this paper has certain reference significance for the calculation of the resistance of flue gas， air and pulverized coal pipeline.