Fast and nondestructive detection of special items has always been the difficulty in inspection and quarantine. The recognition method of similarity measurement is introduced

and is classified and processed Raman spectra of special items is classified and processed by support vector machine（ SVM） is proposed

the SVM is improved for reducing dimension of processing high dimensional vector and enhance the identification accuracy.The results show that the improved SVM is expected to provide an effective auxiliary means for nondestructive and rapid detection for special items in inspection and quarantine system.