Due to its self-lubricity and self-sealing, ferrofluid micropump is more in line with the needs of microfluidic technology applied in biomedicine, life science, chemical analysis, aerospace and other fields. However, current structural designs face challenges in simultaneously achieving simple processing, high reliability, stable flow characteristics, so the application and development are limited. In order to improve the reliability and stability of ferrofluid micropump and promote its development and application, a new type of centrifugal ferrofluid micropump is designed based on the external field control principle of ferrofluid, the magnetorheological effect and the hydrodynamic behavior between medium fluid. Numerical calculations are employed to analyze the flow characteristics of medium fluid. The results show that the micropump can effectively realize the pumping process.At a rotating speed of 10 r/min, the pumping flow can reach 0.07 kg/T in one cycle, and the medium fluid mass exchange between the inlet and outlet of the pump chamber can be blocked under the alternating action of two ferrofluid. Due to the dynamic and static interaction between ferrofluid and the pump chamber structure, the outlet flow rate has a slight pulsation (On the order of 10^-5), but it still remains in laminar flow state (Re＜1). Moreover, due to mechanical factors such as inertia force being related to characteristic size while viscous force and characteristic size are unrelated, the pumping power of the structure is highly sensitive to outlet size and length. As a result, effective pumping cannot be achieved at a speed of 4 r/min and the length of the outlet section is 9 mm. The pressure fluctuation and the self-sealing performance of the phase interface between the ferrofluid and the pumping medium fluid are analyzed simultaneously. The peak value of the pressure fluctuation on the phase interface is much smaller than the self-sealing performance of the ferrofluid, differing by three orders of magnitude. The feasibility of the centrifugal ferrofluid driver is verified from the perspective of the sealing stability and the interface stability of the ferrofluid.