The invention discloses a dewaxing device for producing lubricating oil. The dewaxing device comprises a cooling kettle, a filtering box, stirring arms and cooling liquid flowing pipes, wherein a first motor is arranged above the cooling kettle and is connected with an inner rotating shaft; the inner rotating shaft is fixedly connected with rotating vanes; the stirring arms are fixedly connected with an outer rotating shaft; the outer rotating shaft is fixedly connected with a gear box; a lubricating oil flowing pipe is arranged in the cooling kettle; the cooling liquid flowing pipes are arranged on the inner wall of the cooling kettle; a heater is arranged on the outer side of the filtering box; a plurality of heat conduction rings are arranged on the heater; three filtering layers are arranged in the filtering box. The dewaxing device disclosed by the invention is simple and reasonable in structural design, convenient and quick to use and high in practicality; the three filtering layers are used in a filtering structure, so that a filtering effect can be enhanced; the heating rings are arranged at the periphery of the filter box and can be used for gasifying paraffin; by use of the equipment, quick uniform cooling of lubricating oil is realized, and adverse influence brought by local severe cooling is avoided; the dewaxing device has high practicality for dewaxing treatment of the lubricating oil.