In the real environment, there is a crosssensitivity problem between fiber grating strain and temperature measurement. This paper proposes a simultaneous measurement method of two parameters using chirp fiber grating sensor. By sealing chirp fiber bragg grating (CFBG) on the equalstrength beam, the difference between the sensitivity of the center wavelength and the bandwidth of the CFBG reflection spectrum to temperature and strain is used to form a coefficient decoupling matrix, which can achieve simultaneous measurement of the corresponding change and temperature. At the room temperature, the sensitivities of CFBG center wavelength and bandwidth with strain are 079 and 138 pm/με. The corresponding linearity values are 0998 8 and 0999 3. Among the temperature range of -20~60℃, the sensitivities of the central wavelength and bandwidth of CFBG with temperature are 2274 and 2397 pm/℃. The linearity values are 0999 8 and 0997 0. Experimental results show that the simultaneous measurement of strain and temperature can be achieved using one single CFBG.