A method for producing a carbon fiber bundle includes the acts of: providing at least one precursor, mechanically stabilizing the at least one precursor, and subsequently introducing the mechanically stabilized precursor into at least one thermal treatment device for converting the at least one precursor into at least one carbon fiber bundle. A device for producing a carbon fiber bundle has at least one oxidation furnace and a downstream carbonizing device for carbonizing a precursor to form the carbon fiber bundle, wherein a stabilizing device for mechanically stabilizing the precursor, which is introduced into the oxidation furnace, is connected upstream of the at least one oxidation furnace.