The invention provides a method for producing CNT/CF (carbon nano tube/carbon fiber) hybrid fibers in a batch manner and relates to a preparation method of fibers. The method aims at solving the technical problems that carbon fiber has weak combination strength with epoxy resin due to less active functional groups on the surface of the carbon fiber and thus the mechanical properties of a composite material cannot be fully played. The method comprises the following steps: 1. aminating carbon nano tubes; 2. preparing a carbon nano tube containing sizing agent; and 3. carrying out sizing treatment on the carbon fiber, thereby obtaining the CNT/CF hybrid fiber. The prepared CNT/CF hybrid fiber can be prepared into a monofilament composite material having the interfacial shear strength up to 80.06MPa, which is improved by 77.01% compared with that of an unsized carbon fiber composite material; and the method belongs to the fiber preparation field.