The invention discloses a novel automatic spraying robot for a ship. The novel automatic spraying robot for the ship structurally comprises a system operation panel, a pressure meter, bottom feet, a machine base, a workbench, a stand column, a cross beam, a tin feeding mechanism, a model mark, an electric soldering iron and a tin blowing mechanism; the cross section of the system operation panel is of a rectangular structure and is horizontally and closely attached to the front end of the machine base and mechanical connection is adopted; and the pressure meter is horizontally fixed to the right end of the system operation panel and is electrically connected with the machine base. The machine base achieves that in the tin welding operation process, no electrodes need to be used, the worryof electrode pollution or damage is avoided, because the novel automatic spraying robot for the ship does not belong to the contact type automatic tin welding machine process, the loss and the deformation of the machine can both be reduced to be lowest, it is guaranteed that a laser beam can be focused in a very small area, the automatic tin welding machine is made to be minimum, and for parts small in interval, a high-speed automatic tin welding machine can be easily aligned with a weldment automatically and accurately.