Temperature and strain are two parameters which are both sensitive to FBG sensor.Different from traditional model between temperature or strain and drift of Bragg wavelength,a method based on support vector machine(SVM) is presented in this paper.As an example,a SVM compensation model of pressure sensor is built.The parameters of SVM model are optimized based on the calibrated the kernel parameter of which is 100 and the penalty factor is 16.The compensation result shows the temperature coeffici...