The invention discloses a method for determining a configuration area of a dynamic reactive power compensation device. The method comprises the following steps: building a system simulation model of apower network to be studied, wherein the system simulation model includes: M candidate stations and N faults of dynamic reactive power compensation equipment to be configured; performing static stability simulation calculation on candidate stations to obtain the first voltage weakness index of the candidate stations in static stability dimension; performing transient stability simulation calculation on the candidate stations to obtain the second voltage weakness index of the candidate stations in the transient stability dimension; calculating a comprehensive voltage weakness index of the candidate stations according to the first voltage weakness index and the second voltage weakness index. The method considers the priority of static stability angle and transient stability angle comprehensively based on the voltage variation of candidate station buses, the variation of reactive power and the influence factors of adjacent candidate stations, and can obtain the configuration area of dynamic reactive power compensation devices effectively and accurately.