The invention discloses a classification and continuous control matched large-capacity controllable reactor, which comprises a current detection unit, a compensating current generating unit, a transformer and a thyristor inverse-parallel unit group. The compensating current generating unit generates a current i2 which has inverse phase with a current i1 on a primary side bus of the transformer and comprises a fundamental wave compensating current component and a harmonic wave compensating current component; the i2 automatically traces the change of current at the primary side; and by adjusting the change of the per-unit value of the current in a compensating winding in interval of (-1, +1), the maximum value of the equivalent reactance of the winding is Zx of the equivalent reactance value of a single group of inverse-parallel thyristors. The primary winding of the transformer can be connected in serial or in parallel with a power grid according to the design working conditions so that the equivalent reactance of the transformer is continuous, smooth and controller therebetween. Devices with lower voltage and lower current can be used for manufacturing the controllable reactors applied in the working conditions of high voltage and high current.