The recent progress of fiber sensing techniques in Tianjin University is introduced in this paper. Parallel demodulation for Extrinsic Fabry-Perot Interferometer (EFPI) and Fiber Bragg Grating (FBG) sensors is realized based on white light interference, with EFPI measurement precision of 0.81 μm and FBG wavelength measurement precision of 14 pm. Concentration detection of acetylene is realized by using intra-cavity fiber laser with sensitivity less than 100 ppm. Distributed sensing based on polarization maintaining fiber is realized with resolution of 6 cm. FBG demodulation equipment is developed by using edge filter, with wavelength resolution of 1.2 pm and scan rate more than 200 kHz. Two-dimension and three-dimension scanning of tooth model is realized by using all-fiber optical coherence tomography (OCT). And the dynamic characteristics like temperature and oscillation detection of fiber ring are realized for fiber optic gyroscope.