The present invention provides an intelligent grid connection control method for a photovoltaic grid-connected inverter. According to the method, a sampling conditioning module, a control module, an MPPT controller, an interleaved flyback module and an inversion module are provided; the control module includes a current loop PI regulator composed of a d-axis current regulator and a q-axis current regulator; the control module is connected with the sampling conditioning module, the MPPT controller and the interleaved flyback module separately; the input end of the sampling conditioning module and the input end of the interleaved flyback module are connected with a photovoltaic array; and the output end of the interleaved flyback module and the output end of the MPPT controller are connected with the inversion module. The intelligent grid connection control method of the invention is simple in structural principle. The intelligent grid connection control method can realize the seamless grid connection of the inverter, improve the reliability and stability of a system and the power quality of a power grid, bright social economic benefits and have high control precision and a great application value.