The extraction of inclination voltage signals, digital filtering of Kalman, zero drift suppression and omnidirectional signal synthesis have been carried out by using the frontend sensing circuit being constituted by MEMS inclination sensor and the digital signal circuit being constituted by the microcontroller, and the omnidirectional inclination measurment of carrier in any yaw direction(0°～360°) has been realized in this work. The Kalman digital filter algorithm was used to processes the angle signal and its simulation was carried out by using MATLAB software, as a result, the noise was and its volatility were reduced. Aiming at the zero drift problems, the software algorithm was designed to eliminate the offset errors.The results shows that the stabilities of x-axis and y-axis are increased by 10.95 times and 12.75 times respectively, and omnidirectional inclination sensor meets the requirements of nonlinearity