The invention provides a coordinated emergency control method for near-region power grid voltage of a phase modifier. The coordinated emergency control method comprises the steps of building a data model of a power grid containing a phase modifier; checking the stability of the power grid by adopting an AC/DC system fault; distinguishing the type of a voltage stability problem caused by the fault;if the voltage stability problem is near-region power grid low-voltage suspension of the phase modifier, firstly switching a low-voltage capacitive reactor by turns, and then adopting fixed maximum reactive power output control for the phase modifier; if the voltage stability problem is near-region power grid voltage collapse, adopting fixed maximum reactive power output control for the phase modifier; then judging whether the system voltage recovers or not, if so, exiting, otherwise, firstly switching the low-voltage capacitive rector by turns, and then adopting fixed maximum reactive poweroutput control for the phase modifier. The method provided by the invention can provide emergency control and control indicators in allusion to the near-region power grid voltage of the phase modifier, thereby providing a technical reference for a new generation of phase modifiers to participate in coordinated emergency control for the near-region power grid voltage.