The invention discloses a support seat, and a children bed and a children chair with the same respectively. The support seat comprises a support frame and a pedestal, wherein at least three groups of traction mechanisms are arranged between the pedestal and the support frame; each group of traction mechanism comprises a first ring arranged on the support frame, and a second ring and a third ring which are arranged on the pedestal; the second ring is positioned above the first ring; the third ring is inserted into the first ring and the second ring; and the bottommost part of the pedestal is lower than that of the support frame. The pedestal is usually placed on the ground, so that a base frame is still relative to the ground; the support frame is connected with the base frame by the traction mechanisms, and the support seat is suspended on the pedestal by the traction mechanisms, so that the support frame can move relative to the pedestal when pushed from any direction.