The utility model relates to a low energy consumption return valve for circulating fluidized bed boilers, which comprises a vertical pipe, a baffling device, a grid plate which is provided with wind caps, a wind chamber and a return pipe, wherein the upper part of the grid plate is provided with a valve body and the lower end of the vertical pipe is communicated with the inner chamber of the valve body. A wind outlet of the return pipe is inclined from bottom to top and is communicated with the inner chamber of the valve body, the wind chamber is arranged under the grid plate and the baffling device is arranged in the valve body and between the vertical pipe and a return pipe outlet. The utility model is characterized in that only one wind chamber is arranged under the grid plate, the lower edge of the baffling device is 300 mm to 600 mm lower than the lower edge of the return pipe outlet. The distance between both sides in the horizontal direction of the baffling device is 150 mm to 250 mm, and the wind caps are uniformly distributed on the grid plate. The utility model can save 40% to 60% power consumption to Roots blowers of 25MW to 200MW capacity grade circulating fluidized bed boilers, and the utility model has the advantages of remarkable power saving, simple operation, small size and primary material saving.