Objective: The effect of different drying methods on the product quality of Dendrobium nobile leaves were investigated to provide the theoretical references for the development of processing technologies of D. nobile leaves and the expansion of medicinal parts of this herb. Method: D. nobile leaves were dried by four drying methods

including microwave drying

hot air heating

vacuum drying and vacuum freeze drying

then the impacts of different drying technologies on the color

microstructure

contents of total polysaccharides and dendrobine of D. nobile leaves were investigated. Result: The results showed that the color of vacuum freeze drying products was bright and better than the hot air drying

microwave drying and vacuum drying.Different drying methods differed in the microstructure of samples.The content of total polysaccharides in D. nobile leaves was 3.11% in vacuum freeze drying

3.02% in vacuum drying

2.81% in hot air drying and 2.74% in microwave drying.There was not much difference of drying methods in the dendrobine content. Conclusion: In the field of expenditure

D. nobile leaves have higher content of functional components under hot air drying

which has operability and energy consercation

it can be extended in the application of D. nobile leaves.