Abstract: In order to achieve the temperature and strain of the two-parameter high-precision sensor measurements, a dual-parameter measurement of long period fiber grating(LPFG) fabricated by CO2 laser cascaded with fiber Mach-Zehnder (MZ) interference structure was proposed. The LPFG was fabricated using the CO2 laser and the fiber MZ structure was fabricated using dislocation welding method. The sensing principle was derived and the transmission spectrum of the cascaded structure was monitored for temperature and strain measurements. The experimental results show that the LPFG is sensitive only to the temperature while the MZ structure is sensitive to both temperature and strain, when the temperature varied from 35℃ to 70℃, the LPFG sensitivities for warming and cooling are 38.57 pm/℃ and 39.17 pm/℃, respectively, while the MZ structure sensitivities are 38.57 pm/℃ and 37.50 pm/℃, respectively. When the strain varied from 0 to 450 , the MZ structure sensitivities for loading and unloading are 4.01 pm/ and 4.24 pm/, respectively. A sensor with high sensitivity and good linearity for real-time and dynamic range measurements of dual-parameter was developed.