Due to the difference in the properties of gas and conductive fluid, the presence of gas in conductive fluid may affect the output characteristics of the magnetohydrodynamic micro-angular vibration (MHD) sensor. Based on electromagnetic induction theory and twophase flow theory, the volume of fluids (VOF) model of the MHD sensor containing gas in conductive fluid is deduced and established. ANSYS fluent is used to simulate and analyze the output characteristics of the MHD sensor with gas. An experimental platform is established to verify the MHD sensor with different gas content. The results show that the bubble in conductive fluid is easily torn into small bubbles at low frequencies and disperse with angular vibration, which causes the flow field and electric field of the fluid to shift and distort. The lower the frequency of angular vibration, the more obvious this phenomenon is. When there is no gas in conductive fluid, the external factors such as angular vibration frequency and amplitude, gravity acceleration and eccentricity have no influence on the output characteristics of the MHD sensor. When the conductive fluid contains gas, the output characteristic distortion of the MHD sensor increases with the increase of gas content, gravity acceleration and eccentricity, and decreases with the increase of angular vibration frequency and amplitude. The research results of this article can provide guidance for the filling process control of the MHD angular velocity sensor and help to improve the accuracy and stability of the sensor