The figure of the relative kinematical track of the coplanar flying-around satellites is an ellipse. However, the configuration of the formation flying will change because of the disturbing force. A new formation keeping strategy based on combined maneuver was developed. In Hill orbital coordinates, through the measurement of the relative position components of the flying-around satellites, the combined control of the tangential impulse thrust and the constant continuous radial thrust eliminated the phase excursion of the center of the relative kinematical ellipse. Then the method considering the J₂perturbations was applied to improve the control accuracy. Simulation results show that this control strategy has nice performance on formation keeping.