The invention relates to a floating type track cleaning device. A floating type sliding boot comprises a sliding boot body and an elastic device; the sliding boot body is provided with a left-right cut-through sliding groove, the surface of the sliding groove is formed by a front face, a top face, a back face and a bottom face in an enclosing mode, and the inner ends of an elastic device installing hole which is formed in the sliding boot body and vertically extends front and back are formed in the top face and the front face separately; and the elastic device comprises a spring base, a springand a gland, the gland is fixed to the sliding boot body and located at the outer end of the elastic device installing hole, the spring base is located at the inner end of the elastic device installing hole and is in sliding fit with the elastic device installing hole, an axial limiting structure is arranged between the spring base and the elastic device installing hole, and the spring is installed between the spring base and the gland in a pre-compressing mode. According to the floating type track cleaning device, ore materials attached to the surface of a track can be effectively removed, the wear speed of the guiding sliding boot and the track can be greatly decreased, and the service life of the guiding sliding boot and the track can be prolonged.