Abstract: This paper was specific to conductor segments not forming a closed loop. Taking the displacement current generated by charge accumulation into consideration, this paper present a partial inductance method for conductor segments. Considering charges accumulating at both ends of conductor segment and displacement current, the model obeys ACL（Ampere’s Circuital Law） and obtains an accordant result of this method and energy method. This paper firstly derives that A generated by displacement current of charges accumulation is considerable. Then partial inductance calculation is given by superposition of effect of conduction current and displacement current. Numerical experiment and theoretical proving indicate the accordance between the proposed method and the energy method, whereas existing method may give over 50% larger result for a short cylindrical conductor. In addition, this method can also be applied in a closed loop, because the effect of displacement current can be compensated.