The invention discloses a pre-oxidation device for carbon fiber production and belongs to the technical field of carbon fiber production and processing. The pre-oxidation device comprises a pre-oxidation furnace, an air supply system, an exhaust system, driving devices and a temperature detection control system; the pre-oxidation furnace is serially composed of a first pre-oxidation furnace body and a second pre-oxidation furnace body, each of the first pre-oxidation furnace body and the second pre-oxidation furnace body is provided with a plurality of hearths arrayed up and down in parallel, temperature of the hearths in the first pre-oxidation furnace body is gradually increased from bottom to top, and temperature in the second pre-oxidation furnace body 5 is gradually increased from top to bottom; the air supply system and the exhaust system are connected with the hearths of the first pre-oxidation furnace body and the second pre-oxidation furnace body through pipelines, and the driving devices are mounted at two ends of the hearths. The pre-oxidation device has the advantages of reasonable distribution of temperature regions and temperature gradient, temperature uniformity of a heating system and the like, the temperature in the hearths can be precisely controlled to be gradually varied within 100DEG C and 300DEG C, and temperature control precision is ensured not to be lower than +/-0.5DEG C.