Continuous carbon fiber reinforced polyphenylene sulfide（CCF/PPS）prepreg filament was used as raw material, and flexural properties specimens and interlayer properties specimens were prepared by 3D printing under different process parameters. The structure and properties of 3D- printed CCF/PPS composites were studied by scanning electron microscopy (SEM), micro-CT, differential scanning calorimeter (DSC), flexural properties test and interlaminar shear strength test. It turns out that the interface between adjacent printed layers and lines, pore structure and crystalline structure have great impact on the mechanical properties of printed products. When the layer thickness is 0.2 mm, the deposition space is 0.4 mm², and the post-heat treatment is adopted, the printed products can obtain the maximum flexural strength of 699 MPa and the interlaminar shear strength of 43.32 MPa, which has reached the leading level among the research field of 3D printing of continuous fiber reinforced thermoplastic composites.