Conclusion:The method of intratracheal cannula empting dust or drug into respiratory duct was better than other two methods .It was a good way for reproducing animal model of lung diseases.

• 结论：气管内插管注入染尘的方法较耳镜扩大口腔法和压舌板法优越，是肺部疾病建立动物模型复制和给药的较好方法。