<p>Steel-carbon-fibre–reinforced thermoplastic hybrid structures are widely used in engineering. Their performances are highly constrained by interface strength. This paper applies the laser-assisted in situ consolidation process to achieve the direct additive manufacturing of steel-carbon fibre reinforced polyetheretherketone (CF/PEEK) hybrid structure, with upgraded interface bonding strength. PEEK film is introduced, as an interlayer, to improve the bonding strength between the steel and CF/PEEK prepreg tape. The influence of surface texture, PEEK film thickness, cooling condition, laser power, and placement rate on the interface bonding strength between the steel and CF/PEEK is investigated and discussed. Based on optimal parameters, the maximum lap shear strength of 14.9&#xa0;MPa is achieved. In addition, the crystallinities of PEEK films are measured to interpret the failure mode. The pyrolysis kinetics model of CF/PEEK prepreg tape is established to investigate the influence of the process parameters during the laser-assisted in situ consolidation process. Finally, a steel-CF/PEEK hybrid shaft with high interface bonding performance is fabricated through the proposed method, which shows overwhelming potential for the steel-carbon-fibre–reinforced thermoplastic composite (CFRTP) hybrid structure manufacture.&#xa0;</p>