The invention discloses a feeding device used for a converter and the converter with the feeding device, and further discloses a feeding method. The feeding device used for the converter comprises a smoke cover, a door body, a walking track, a transport cart, a driving part and a controller. A space for containing the converter is formed in the smoke cover and an opening communicated with the space is further formed in the smoke cover. The door body is arranged on the smoke cover in the mode that the door body can move between the opening position where the opening is opened and the closing position where the opening is closed. The walking track is arranged in an inclined mode, one part of the walking track penetrates through the opening and stretches into the space, and another part of the walking track is located above the rest of the walking track. The transport cart is arranged on the walking track movably. The driving part is connected with the transport cart. The controller is provided with a displacement encoding unit, the displacement encoding unit is connected with the driving part and the controller is connected with the door body. The feeding device has the advantages of being high in automation degree, high in feeding speed, free of environmental pollution and the like.