Inductive current divider has high accuracy and high stability of current ratio, which is widely used in the verification of current transformer and other fields. In this paper, a method for calibrating inductive current divider based on the principle of reference current increment method is proposed, and the basic principle of reference current increment method is introduced; the design principles of reference current transformer and differential current measurement circuit are analyzed; the experimental circuit for the self-calibration of the inductive current divider is built; the developed two-stage inductive current divider is calibrated in the frequency range of 50 Hz～1 kHz, and the uncertainty of the calibration result is analyzed. The experimental results show that, in the frequency range of 50 Hz～1 kHz, the measurement synthetic standard uncertainty of the ratio difference of the two-stage inductive current divider is better than 5×10-8 A/A, and the measurement synthetic standard uncertainty of the phase difference is better than 1×10-7 rad.