The invention provides a double-tube type electromagnetic induction RH device and method for heating molten steel and removing inclusions. The device comprises a steel ladle, a vacuum chamber, an ascending pipe, a descending pipe, an iron core and an induction coil, wherein the ascending pipe and the descending pipe are arranged at the bottom of the vacuum chamber, lower ports of the ascending pipe and the descending pipe are communicated with the steel ladle, and the iron core is of a solid structure and is arranged in the manner of surrounding the ascending pipe or the descending pipe; and parts, close to the outer side of the ascending pipe or the outer side of the descending pipe, of the iron core are wound with the coil, and the axis of the coil keeps to be perpendicular to the axis of the ascending pipe or the descending pipe. The method includes the process steps that (1) the molten steel generates circulation motion in the vacuum chamber, the ascending pipe and the descending pipe according to the airlift pump principle; (2) a forced air cooling or water cooling device is started, alternating current is led into the induction coil, and the inclusions are continuously removed; and (3) after the temperature of the molten steel rises to the temperature which is 10 DEG C to 300 DEG C higher than the liquid phase line, electrification is stopped, the forced air cooling or water cooling device is stopped, and the molten steel is led into a next working procedure.