The invention discloses a photovoltaic inverter circuit capable of improving the utilization rate of a photovoltaic power generation system. The photovoltaic inverter circuit is characterized in that a photovoltaic cell is connected in parallel with a voltage stabilizing capacitor through a diode, and is connected into the photovoltaic system through a three-phase full-controlled bridge type circuit and a filtering inductor sequentially. With the photovoltaic inverter circuit of the invention adopted, photovoltaic grid connected power generation can be realized, and reactive power compensation for a power grid can be realized; when photovoltaic grid connected side voltage is lower than the voltage of a grid connected point, a certain reactive current can be supplemented for the power grid through an inverter; and therefore, multifunctional utilization of devices can be realized, and the electric energy quality of the power grid can be improved, and the utilization rate of the whole system can be improved, and at the same time, repeated startup and shutdown of the grid connected operation of a photovoltaic power generation device can be avoided, and smooth transition can be realized.