The invention provides a novel interpolar current transfer switch which comprises a driving branch, a driven branch, a full-bridge sub module and a control module. The driving branch comprises an upper bridge arm and a lower bridge arm in serial connection, the driven branch comprises another upper bridge arm and another lower bridge arm in serial connection, a first polar lead is connected between the upper bridge arm of the driving branch and the upper bridge arm of the driven branch, a third polar lead is connected between the lower bridge arm of the driving branch and the lower bridge arm of the driven branch, and a second polar lead is connected between a connecting point of the upper and lower bridge arms of the driving branch and a connecting point of the upper and lower bridge arms of the driven branch. Compared with the prior art, the novel interpolar current transfer switch reduces DC change speed when the voltage polarity of the third polar lead is reversed, and the required current to disconnect the interpolar current transfer switch is also reduced.