The invention provides an SVG (Scalable Vector Graphics) based over-frequency/ under-frequency anti-islanding device of a distributive photovoltaic generating system. The device comprises a cabinet body, a scram button, a voltmeter, an operating switch and a static var generator; the scram button is mounted on the surface of the cabinet body; the voltmeter, the operating switch and the static var generator are mounted in the cabinet body; the operating switch is chained with the static var generator through a cable; the voltmeter is connected to a cable between the operating switch and the static var generator through a conductor. According to the device, the static var generator can be adaptively added to a distribution and transformation medium- and low-voltage bus by a distributive photovoltaic way, and a 380V distribution branch box, a 220V/ 380V consumer distribution box and other typical forms can be introduced; the introduced static var generator does not damage a distributive photovoltaic generating system device, electrical load, low-voltage fuse and the like; the input capacity of the static var generator is connected with the capacity for forming an island system.