The invention discloses an industry kiln furnace capable of achieving mixed heating. The industry kiln furnace comprises a preheating furnace body, a heating furnace body, a constant-temperature furnace body and a cooling furnace body which are sequentially arranged; a natural gas combustion device is arranged in the heating furnace body; an electric heating device is arranged in the constant-temperature furnace body; and the cooling furnace body is connected with the preheating furnace body through a waste heat pipe. According to the industry kiln furnace capable of achieving mixed heating, different heating modes are adopted according to the temperature interval of the industry kiln furnace and material production technologies, heat energy is utilized to a maximum limit, the industry kiln furnace can be better matched with the sintering characteristics of materials, the heat energy conversion efficiency can be utilized to a greater extent, and the production cost can be reduced.