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Aiming at the fact that the oceangoing vessel protective plates is affected by the stormy waves, the tide and the random explosion shock wave, the spallation and cracks are easily caused. By controlling the finite element "life and death" state, the temperature field field dynamic process of pulsed laser remanufacture was simulated. The derivation law of temperature field in forming process was obtained, the forming process of pulse laser remanufacturing was optimized. The analysis and test results show that, the pulsed optimization process parameters are laser power 3KW, the spot diameter is 3mm, the scanning speed is 6mm/s, the pulsed laser pulse width 10ms, the duty cycle is 1:1. The heat affected zone deformation after forming is controlled within 0.02mm, the maximum hardness is 95HV0.1 which appeares in the heat affected zone. The heat affected zone is closely metallurgical bonded with the base metal, the weld is mainly consisted of fine grained structure, the tensile strength is up to 222Mpa.