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Polyetheretherketone (PEEK)/carbon black (CB) blending sheets with an thickness of 0. 5 mm were prepared by a compression molding process using Victrex PEEK-450PF as a raw material, and their optical characteristics were characterized by a laser power meter and UV-Vis-IR spectrophotometer. The effect of CB content on the laser energy deposition efficiency of blending sheets was investigated under the process condition of a laser power density of,35 W/cm² and a moving speed of 5 mm/s. A numerical model was established for the laser energy absorption of PEEK by using the COMSOL software. The results indicated that pure PEEK sheet did not strongly absorb the laser at a wavelength of 1 070 nm. However, the addition of CB could significantly reduce the reflection and transmission of PEEK to the laser and enhance the photo-thermal conversion efficiency of blending sheets. There was little effect on the tensile strength of blending sheets. In addition, the numerical simulation results were found to be in good agreement with the experimental ones. [ABSTRACT FROM AUTHOR]