The utility model discloses a device for debitterizing linseed oil. The device consists of a linseed oil storage tank, a debitterized linseed oil storage tank, a fresh ethanol storage tank, an extracted ethanol storage tank, a fresh water storage tank, a wastewater storage tank, oil-ethanol cyclone hydraulic separators of no less than one stage, oil-water cyclone hydraulic separators of at least one stage and mixed high-pressure pumps, wherein the number of the mixed high-pressure pumps is equal to that of the oil-ethanol and oil-water cyclone hydraulic separators; and the oil-ethanol cyclone hydraulic separators are in series connection, each oil-ethanol cyclone hydraulic separator is connected with one mixed high-pressure pump, the fresh ethanol storage tank is communicated with the oil-ethanol cyclone hydraulic separator of the last stage, the oil-ethanol cyclone hydraulic separator of the first stage is connected with the extracted ethanol storage tank, the linseed oil storage tank is communicated with the oil-ethanol cyclone hydraulic separator of the first stage, and the oil-water cyclone hydraulic separators are connected with the oil-ethanol cyclone hydraulic separator of the last stage. According to the device, the linseed oil and a solvent are subjected to multi-stage countercurrent extraction, so that the aim of debitterizing the linseed oil is achieved.