A method for coordinate control of series unit of a distributed power flow controller is provided in the invention. A DPFC series unit coordinated control system comprise a coordinated controller, A plurality of serial unit controllers and a PLC unidirectional communication link, this method calculates the reference phasor of the fundamental frequency compensation voltage of the series unit in thecoordination controller, and the phase difference between the fundamental frequency current of the transmission line and the terminal voltage corresponding to the initial steady state is obtained byusing the WAMS system and the waveform of the fundamental frequency current of the transmission line collected on the spot by the series unit generates the waveform of the terminal voltage in the series unit, Furthermore, the waveform of the reference phasor of the fundamental frequency compensation voltage of the series unit is generated, and the actual output phasor of the fundamental frequencycompensation voltage of the series unit is controlled to approximate the reference waveform of the fundamental frequency compensation voltage of the series unit, so that the accurate and fast controlof the DPFC series unit can be realized without the high-speed communication link.