The invention discloses a switched reluctance motor rotor position estimation method based on a virtual unit inductance vector, and belongs to the technical field of switched reluctance motor control.The method comprises the following steps: firstly, establishing a saturated inductance model, and performing calculating to obtain a virtual unit inductance vector, so that the rotor position can still be estimated through an arc tangent function when the inductance is distorted under a large current, and the switched reluctance motor can stably operate under the condition that a position sensoris not mounted. The method has the advantages that only the saturation coefficient k needs to be stored; the occupied memory is extremely small; the algorithm is simple, convenient and fast; additional hardware is not needed, and the rotor position can still be accurately estimated under the condition that inductance distortion is caused by flux linkage saturation; and in addition, the position estimation is carried out through three-phase information; the accuracy is high; the estimation information is continuous; jitter is avoided; and the stable operation can be realized under high and lowspeed conditions.