The utility model discloses a full-automatic vacuum tunnel baking oven. The full-automatic vacuum tunnel baking oven comprises a tunnel baking machine case and an external control cabinet connected with the machine case, and is characterized in that a heating box, a vacuum box, a cooling box and a conveying mechanism are arranged in the tunnel baking machine case; an air supply system and a heating device are arranged in the heating box; a vacuum system and a heating device are arranged in the vacuum box; the heating box and the vacuum box are in connecting transition through a vacuum transition door to form a closed and independent blast heating channel, and the vacuum box and the cooling box are in connecting transition through a vacuum transition door to form a closed and independent vacuum heating channel; the conveying mechanism penetrates through the heating box, the vacuum box and the cooling box in sequence. By the adoption of the full-automatic vacuum tunnel baking oven, materials can continuously work in an independent and closed heating environment, an independent and closed vacuum environment and an independent and closed cooling environment respectively, the uniformity of the dried materials can be guaranteed, the occupied area, electric energy consumption and labor cost can be effectively reduced, and the purposes of environment protection and energy conservation can be achieved.