The amplitude-phase regeneration of 8-phase shift keying (8PSK) signal using a phase-sensitive parametric amplifier (PSA) in a silicon graphene oxide hybrid waveguide is investigated. A novel graphene oxide hybrid waveguide with two zero dispersion points at 1330 nm and 1550 nm and a nonlinear coefficient of up to 10⁶ W^-1·m^-1 was designed by using a horizontal and vertical groove structure filled with high Kerr coefficient material graphene oxide. A two-stage amplitude-phase regeneration scheme for 8PSK signal is designed using this waveguide, where the phase regeneration stage is realized with a double-pumped degenerate PSA structure, and the amplitude regeneration stage is realized by wavelength conversion based on saturated four-wave mixing effect, which ultimately achieves the regeneration of the 8PSK signal in both phase and amplitude dimensions. The regeneration performance of the signal is evaluated using constellation diagram、the error vector magnitude and optical signal-to-noise ratio. The results show that this waveguide PSA has good amplitude-phase regeneration and noise compression capabilities, and has important application prospects in all-optical signal processing.