The invention provides a partitioned load switching cooperative method for maintaining a voltage stabilization of an electric system. The partitioned load switching cooperative method for maintaining the voltage stabilization of the electric system comprises the following steps: collecting node data; performing a real-time Thevenin equivalent calculation to the system; calculating a voltage dynamic linearized equation retaining non-linear characteristics; acquiring a voltage control criterion from a modal analysis; setting a SVC voltage reference value based on voltage dynamic stabilization information and voltage static stabilization information; launching the partitioned load switching scheme if the control for stabilizing the voltage cannot be achieved. The provided method is able to effectively cooperate with the partitioned load switching method for preventing the instability of the voltage. The voltage drop depth can be reduced in the voltage recovering process. Therefore, the voltage can be stabilized quickly within a reasonable range.