The spectrum of phase-shifted long-period fiber grating is analyzed by the coupled-mode theory and transfer-matrix method. Then under the guidance of this analysis, it is for the first time that the phase-shifted long-period fiber grating is fabricated successfully by using high-frequency CO 2 laser pulses. During the process of fabrication, computer is used to draw the structural graph of the gratings and to control the power and time of laser pulses exposed on the optical fiber. In such a way, the gratings are made automatically. The grating made actually shows the phase-shifted spectrum during the scale of 1520～1570 nm and 1610～1670 nm. The temperature response of the latter is tested, and the result shows that the center wavelengths of the one pass band and the two loss bands have the same index: 0.064 nm/℃.What′s more, the strain response of the PSLPG is measured, and the result shows that the index is -0.51 nm/mε. So in the sensing field, it is viable to test the centre wavelength of the pass band to m