To establish a convenient and effective near-infrared spectrometry(NIR)analytical method aimed at the determination of dextrin in Salvia extract powder.Methods：Collected the near-infrared spectroscopies of samples containing dextrin of default concentrations and established quantitative models by PLS(partial least squares method).Results：The PLS quantitative model has a good prediction performance(rval = 0.9871，RMSEP = 1.085%).Conclusion：Near infrared spectroscopy can be used as a rapid determination method of the concentration of dextrin in Salvia extract power and the uncertainty of the method can be accepted.