The present invention relates to a baby float. The multi-functional baby float comprises a float body and a buoyant tail for increasing the buoyancy of the back; the buoyant tail is detachably connected with the end of the float body; and the back of a head of the float body is provided with an elevating mechanism for raising the head of the float body. The elevating mechanism comprises an inflatable airbag or a connecting structure. The connecting structure comprises some rows of female buckles; the buoyant tail is provided with son buckles; and the buoyant tail is fixedly connected with the float body through the matching of the son buckles and the female buckles. The present invention has the characteristics that the back buoyancy can be increased to prevent roll-back, the buoyant tail can be detached and installed below a headrest.