The invention relates to a cyclone device based on an electrochemical technology. The cyclone device comprises a cyclone barrel, a cylindrical shell barrel, an overflow pipe, a feeding pipe, an electrode assembly and a direct-current power source, the cyclone barrel is arranged in a hollow inverted cone shape, the lower end of the cyclone barrel is provided with an underflow port communicating with the interior of the cyclone barrel, the lower end of the cylindrical shell barrel is detachably connected with the upper end of the cyclone barrel, and the upper end of the cylindrical shell barrelis provided with an end cover. The overflow pipe penetrates through the middle of the end cover along the vertical direction, the feeding pipe extends along the tangential direction of the cylindricalshell barrel and communicates with the inner space of the cylindrical shell barrel, the electrode assembly is attached to the inner side wall of the cyclone barrel, and the positive electrode and thenegative electrode of the direct-current power source are sequentially and electrically connected with the positive electrode end and the negative electrode end of the electrode assembly. The problems that low separation efficiency and high treatment difficulty occur in the separation process of an existing cyclone device when the emulsification degree of a medium in mixed liquid is high, the viscosity is large or the densities of the two-phase or multi-phase media are similar can be well solved.