The paper firstly introduced the sensitive mechanism of micromachined airflow omnibearing level posture. Adopt micro-machine technology, octagonal sense organ is sensitive to omnibearing level posture. Signal processing circuit is composed by pre-signal circuit and digital circuit, to obtain voltage, omnibearing signal synthesis and resolution compensation of omnibearing tile angle signal. It is testified that: resolution<0.1°,the scope of azimuth is 360°,the scope of tile angle is 20°. The sensor is not only in small size but also in simply crafting. It is good in sensitive organ’s output consistency,and suitable for mass production.