The invention discloses an active power type control method for the running mode of a bipolar flexible direct current power transmission system. The method comprises the following steps: whether one pole of a station is in running or not is detected, if the pole in running is under direct voltage control, the pole not in running is selected to be under direct voltage control, and if the pole in running is under indirect voltage control, the pole not in running is selected to be under indirect voltage control; if neither of the two poles is in running, or the two poles are selected to be in the running mode simultaneously, the two poles of the station are selected to be under the same control mode, namely, under the direct voltage control mode or the indirect voltage control mode; if an alternating current system is a passive system, both the two poles are selected to be in the non-voltage control mode, and the non-voltage control mode of at least one pole is selected as the frequency control mode; if neither of the two poles is in running, one pole is selected to be in the running mode, and if the alternating current system pole is the passive system, the non-voltage control mode of the pole run first is selected as the frequency control mode. The decoupling running of two stations is realized, and problem of frequency and power instability caused by control mode selection mistakes is avoided.