The invention discloses a high-salt-content organic wastewater treating device comprising an electric flocculation unit and a membrane biological treatment unit. The electric flocculation unit comprises a flocculation groove in which an anode plate and a cathode plate which are parallel to each other are arranged. The lower part of the flocculation groove is provided with a precipitation area, and the upper part of the flocculation groove is provided with a slag scraper. An ultrasonic scale inhibitor is arranged in the flocculation groove. The membrane biological treatment unit comprises a two-stage membrane bioreactor which comprises an immersion-type micro-filtration membrane component with aperture of 0.1-0.4 micron. Wastewater firstly undergoes electric flocculation treatment in the electric flocculation unit and then membrane separation and biological treatment in the membrane biological treatment unit. The process and the apparatuses in use are simple, the treatment effect is stable, the quality of the effluent is good, and the operation cost of the device is low.