The invention discloses a total reflection axis focused carbon fibre graphitization furnace for a laser tunnel. The total reflection axis focused carbon fibre graphitization furnace for the laser tunnel is composed of the six parts including a graphitization cavity, a quenching cavity, a laser heating system, a sealing system, a fibre conveying system and a safety accessory, wherein the laser heating system is located in the graphitization cavity; the graphitization cavity is connected with the quenching cavity through the sealing system; the fibre conveying system drives fibres to penetrate through the graphitization cavity, the sealing system and the quenching cavity respectively. According to the total reflection axis focused carbon fibre graphitization furnace for the laser tunnel, disclosed by the invention, graphitization efficiency is greatly increased by virtue of laser heating, thus avoiding heat loss and reducing production cost and energy consumption; the product is stable in quality, and the operation is safe; graphitized fibre crystallization is more compact due to a liquid argon quenching process, thus greatly improving the strength and the toughness of the fibres; magnetofluid thread sealing is safe and reliable, leakless, easy to maintain, and capable of better isolating the graphitization furnace from the outside atmosphere and providing an oxygen-free environment for a graphitization process, thus ensuring the quality of the carbon fibres.