Device and method for reducing underwater resistance of metal component through pulse laser

The invention relates to a device and method for reducing underwater resistance of a metal component through pulse laser, the method comprises a walking trolley and a laser frame, a linear guide rail mechanism is arranged on the walking trolley, and the laser frame is movably arranged on the linear guide rail mechanism and can move along the linear guide rail mechanism; a laser head is connected to the laser frame through a three-dimensional adjusting assembly, and the three-dimensional adjusting assembly can adjust the spatial pose of the laser head, so that laser emitted by the laser head irradiates the surface of the metal component, the surface of the metal component is scanned back and forth, and a super-hydrophobic anti-drag microstructure is formed on the surface of the metal component. The laser head is adjusted to scan a to-be-machined area on the surface of the metal component, and the surface of the metal component is etched in cooperation with movement of the walking trolley, a super-hydrophobic c