Aiming at the problems of temperature change and tower tilt in OPGW transmission line monitoring，a wavelength division multiplexing multi-parameter monitoring array based on fiber Bragg grating is designed. The mathematical relationship between grating strain and temperature and tilt is deduced from the theoretical model，and then the tower model is imported into CMOSOL Multiphysics for qualitative analysis. Finally，the temperature and tilt test are carried out. The test results show that the tower temperature monitoring resolution based on fiber grating can reach 0.1 ℃. The angle correlation coefficient K value of the inclination sensor is 0.0501 nm/° ，which proves that the proposed monitoring array has a good monitoring application prospect in the power industry.