The invention relates to an adjustment method capable of eliminating the reactive circular power flow of the SVG and electricity collection wires of a photovoltaic power generation station and belongs to the photovoltaic power generation station reactive power automatic adjustment technical field. The method of the invention includes the following steps that: when one adjustment period comes, the current reactive power values of photovoltaic grid-connected inverters, electricity collection wires connected into the same low-voltage bus-bar and the current reactive power values of the SVG are acquired from a local monitoring system of the photovoltaic power generation station; whether reactive circular power flow exists is judged, when the reactive circular power flow does not exist, adjustment is terminated, when the reactive circular power flow exists, the reactive power adjustment amount for eliminating the circular power flow is determined, the reactive power set values of each photovoltaic grid-connected inverter under corresponding electricity collection wires and the reactive power set value of the SVG are determined according to the reactive power adjustment amount; and the set values are issued respectively and are executed, and adjustment is completed, and a next period is awaited. With the adjustment method of the invention adopted, a reactive circular power flow phenomenon of the SVG and the electricity collection wires appearing in the photovoltaic power generation station can be timely eliminated, and the economical efficiency of the operation of the photovoltaic power generation station can be improved.