Abstract: The LCL type grid connected converter adopts the closed-loop feedback mode of converter side current, which will lead to the grid connected current phase lagging behind the grid connected voltage, and can not meet the operation of grid connected system unit power factor. Due to the small phase difference, it has not been paid attention to in the related research fields. However, with the large-scale grid connected power of new energy and the complexity of converter topology with reactive components, the phase lag problem of parallel nodes will become increasingly prominent, which will lead to the lack of active power and even grid disconnection. To solve these problems, this paper defined the concept of local complex impedance, analyzed the causes of the phase difference of parallel nodes, and then proposed a phase reconstruction strategy to improve the phase lag of grid current. The phase space vector relationship between the controlled current and the grid connected current was clarified from the impedance point of view. The phase difference between the grid connected current and the voltage was corrected while maintaining the self stability of the converter side current closed-loop control. This method does not need additional sensors, and does not need to redesign the phase-locked loop. It still has good adaptability in the case of grid distortion. The concept of local complex impedance can be extended to other research fields of LCL type filter structure and its derived topology, which can provide some reference for improving the related research of grid connected power factor. Finally, the simulation and experimental cases verify the correctness and feasibility of the analysis results.