A new method for fast measuring the inductive winding parameters of electrical equipments such as electric transformers， generators etc is proposed. The measuring circuit is composed of several serial connected devices such as: a dc power supply， an external large resistance， an additional inductance and the measured windings. Before measuring， the measuring circuit is adjusted based on the‘identity' principle to make time constants fixed values and steady state currents of the measuring circuit of different apparatuses identical， so that the same measuring accuracy for different measured windings can be obtained. Then the winding is measured by dynamic method， which can avoid measuring error of direct current resistance caused by little change in the current. The introduction of additional inductance makes it unnecessary to solve derivative value of the current， thereby， the error caused by solving numerical differentiation of discrete sampling can be eliminated.