NIRs were pretreated by Fast Fourier Transform(F Savitzky-Golay Smoothing, first derivative, second derivative and Standard Normal Variate(SNV) methods with different sizes of pretreatment window using Origin 8.5.1 SR2 b315(OriginLab Corporation, USA). The developed models were optimized by selecting efficacious spectra pretreatment meth ods with the suitable sizes of pretreatment windows, the char- acteristic wavelength variables, the number of hidden nodes and the spread constants by MWRBFNN