A feed-mixing wagon includes a container for receiving feed. The container includes a bottom, and a peripheral wall which is closed off at a bottom end by the bottom. A mixing element is provided for mixing the feed to be accommodated in the container. The peripheral wall is provided with a wall covering which extends at least along a bottom, ring-shaped part of the inner surface of the peripheral wall. The wall covering includes a plurality of wall plate parts with upwardly extending side edges. Two adjoining side edges of at least two respective adjoining wall plate parts are clamped to the inner surface of the peripheral wall by clamping strips which overlap these adjoining side edges and which are attached to the peripheral wall of the container by means of detachable fasteners.