The invention discloses a multifunctional water-movable lower limb training apparatus, which comprises a walking rack, a walking resistor, a lower limb aid and a folding seat, wherein the walking resistor and the lower limb aid are fixed to the end face, in an advancing direction, of the walking rack, and the lower limb aid is arranged at the upper side of the walking resistor; and the folding seat is fixed to the walking rack. With the application of the apparatus, a patient can be trained to independently walk in water safely and stably; patient's fear of walking can be removed; walking resistance can be changed in accordance with situations of patients, so that the training apparatus is adaptive to various patients; patients can also take a rest at any time in any place; patients, who have difficulty in walking, can also lift legs under the assistance of buoyancy force; and the training apparatus can be moved along with a car, and the training apparatus is simple and convenient.