The invention provides a distributed photovoltaic power station reactive power compensation device SVC / SVG and inverter coordinated and optimized control method. On the condition of a steady state, a reactive power compensation device SVC / SVG is adjusted preferably in a reactive adjustment process; after voltages of grid connection points are stabilized, the reactive level of an inverter is adjusted; reactive loads needed by a photovoltaic power station are transferred from the power compensation device SVC / SVG to the inverter, and accordingly loads of the reactive power compensation device SVC / SVG are reduced, and electricity consumption of the reactive power compensation device SVC / SVG is reduced. On the condition of the steady state, the reactive capacity of the inverter is made full used of, the reactive loads of the reactive power compensation device SVC / SVG are reduced, and accordingly power consumption of the reactive compensation device is reduced, house supply is reduced, and on-grid energy of the distributed photovoltaic power station is increased. It is guaranteed that more reactive adjustable degrees are reserved when the reactive power compensation device SVC / SVG is in the steady state, in the transient process, enough reactive compensation capacity is achieved, and accordingly it is guaranteed that the voltage is stable in the transient state, and the situation that the inverter is off line is avoided.