FC-type high-pressure filter and reactive power compensation device composed of a filter reactor and special filter capacitor. Reactors and capacitors are formed in the characteristic frequency of the LC series resonant harmonic, the second harmonic corresponds to a low impedance path, that most of the harmonic currents flowing into the filter circuit. FC-type filter and reactive power compensation device filtering effect is obvious, the ability to absorb all or most of the harmonic, well-maintained electrical environment, protect the safe operation of electrical equipment, while improving power factor, received good value for money.