The utility model relates to an SVG line-in reactor capable of effectively inhibiting switching-on instantaneous surge current. It is characterized in that, the reactor is series connected in the SVG circuit, line-in end of the reactor is connected with a high-voltage power supply through a contactor, and line-out end of the reactor is connected with an SVG power device. Through mounting the reactor at line-in end, the utility model can effectively inhibit surge current, guarantee safe operation of SVG device and other loads, protect them from current impact, greatly reduce each order harmonic content, and improve power grid power factor.