The invention discloses a multi-freedom-degree adapting mechanism of an elastic board. The multi-freedom-degree adapting mechanism comprises an elastic positioning shaft, reset springs, a spherical pair movement block, a sliding block and a sliding groove, wherein one end of the elastic board is connected with one end of the elastic positioning shaft; the spherical pair movement block is semi-spherical; a through hole is formed in the center of the spherical pair movement block; the sliding block is provided with an arc face groove matched with the spherical pair movement block in shape; a through hole is formed in the center of the sliding block; the diameter of the through hole in the sliding block is greater than that of the through hole in the spherical pair movement block; the other end of the elastic positioning shaft penetrates through the through hole in the sliding block and the through hole in the spherical pair movement block; the two reset springs are arranged on the elastic positioning shaft in a sleeving mode and located on the two sides of the sliding block and the spherical pair movement block correspondingly; the other end of the elastic positioning shaft is connected with a locking nut used for compressing the reset springs; and the sliding block is located in the sliding groove and can slide along the sliding groove, and the sliding direction of the sliding block in the sliding groove is perpendicular to the axis of the elastic positioning shaft. The multi-freedom-degree adapting mechanism ensures the effect that no additional stress is generated when the elastic board swings.