In order to provide an efficient method for determining the continuous production of single-base propellants,influence of solvent content on the quality of the single base propellant and the solvent content of the cartridge were detected by near infrared spectroscopy( NIR). Through the analysis of single base propellant samples with ether and ethanol spectrum acquisition and spectrum,solvent modeling wavelength range was represented as 9 403. 2-7 499. 5 cm~(-1),and first-order derivative method was selected...