MagneticLiquid Double Suspension Bearing(MLDSB) uses double support form—hydrostatic pressure support and electromagnetic Suspension. While its support capacity and stiffness can be improved sharply, the operation stability of MLDSB can be impacted by some factors which affect the stability of its support system operation. The operation stability of single DOF support system of MLDSB is analyzed and corrected in this paper. Firstly, this paper introduces the structural features and support adjustment mechanism. Secondly, based on force balance equation, electromagnetic equation and flow equation, the transfer function of single DOF support system of MLDSB is deduced, and its support stability is analyzed. The research shows that the existence of the right pole of the single DOF support system is the main reason for instability of the system. Finally, the stability of single DOF support system is corrected using the root locus method and the frequency method and tested by Matlab software. We show that the operation stability and the dynamic quality of the corrected support system is improved greatly. The research in this paper can provide the theoretical reference for the structure design and performance analysis of MLDSB.