The utility model relates to an adjustable-power type electric reactor. The electric reactor comprises a static iron core, a winding, a dynamic iron core and a lifting mechanism; the winding is coiled on the static iron core; at least one air gap is formed in the static iron core; the dynamic iron core is opposite to the corresponding air gap by positions; the lifting mechanism is used for adjusting the depth of the dynamic iron core in the corresponding air gap; the longitudinal section of the upper section of the air gap is in a shape of a wedge, and while the longitudinal section of the lower section of the air gap is rectangular; the longitudinal section of the part of the dynamic iron core, extending into the air gap is also in the shape of the wedge. According to the adjustable-power type electric reactor, the length of the effective air gap can be adjusted, the linear degree of air gap adjustment is high, thus the linearity of induction regulation can be ensured, and magnetic saturation can be effectively prevented.