Abstract: Aiming at the problems of inaccurate measurement data caused by installation position, environmental temperature and humidity, dust and other factors of mine differential pressure wind speed sensor, and unstable measurement value caused by insufficient anti-electromagnetic interference ability, through the analysis and demonstration of the wind speed sensor model, the structure of the pressure taking device(S-typepitot tube) is improved, the circuit principle is optimized, the EMC （electro magnetic conpatibility） capability of the circuit board is enhanced, and the first-order inertial soft filtering algorithm is combined to reduce the noise interference of the wind speed sensor, suppress the fluctuation range and frequency of the sensor data, and improve the indication stability of the sensor.