A design of mine wind speed sensor using fiber Bragg grating (FBG) was reported, which was based on differential pressure principle and differential sensitive architecture was adopted which was composed of a bellows, an equal-strength beam and two FBGs. Furthermore, an algorithm was introduced for temperature compensation. Through these methods the cross sensitivity of temperature was effectively eliminated and a high strain sensitivity was achieved. The relation between the central wavelength variation of the two FBGs and the wind speed was derived. Meanwhile, the hydraulic simulation test of sensitive architecture was carried out and the sensitivity of 0.703 pm/Pa was given, which agreed well with the theoretical value. The wind speed sensor was tested by wind tunnel and the results show that the measurement error of the sensor is within ±0.3 m/s in the range of 0.2-20 m/s, and the wind speed sensor has good linearity.