This study investigates a compact, high-power, large-core crystal waveguide mode-locked laser. The structure of a Herriott-type multipass cavity is investigated and experiments are conducted using a high-power crystal waveguide mode-locked laser featuring a multipass cavity. The experiment achieves continuous mode-locked pulses with an average power of 33 W, a pulse duration of 3.32 ps, a repetition rate of 61.3 MHz, and a central wavelength of 1031.3 nm. The experiment simplifies the structure of the crystal waveguide mode-locked laser and reduces its volume.