The invention discloses a ferry vehicle for preparing lightweight concrete and belongs to the technical field of building block conveying equipment. The ferry vehicle comprises a vehicle body, a power device, a transmission device, two first guide rails arranged in parallel and a wire protecting device. The bottom of the vehicle body is provided with two transmission shafts, and the top of the vehicle body is provided with two second guide rails. The two ends of the transmission shafts are provided with rail wheels matched with the first guide rails correspondingly. The power device is located on the upper portion of the vehicle body and connected with the transmission device. The transmission device comprises a first gear arranged on a driving shaft of the power device, a second gear arranged on the transmission shafts, and a chain. The wire protecting device comprises a groove parallel to the first guide rails and a multi-section protective shell in chain type connection. By means of the ferry vehicle, a wire can be protected against damage from the outside world, the threat to worker safety is greatly reduced, the ferry vehicle can be accurately positioned, and displacement of the ferry vehicle is controlled.