Aiming at reducing the heat input of the forming course, controlling the distribution of heat-affected zone and the stress distribution of the forming layers, the forming course of laser remanufacture was simulated dynamically in the method of finite element analysis. The temperature field of the laser remanufacture for CW/pulsed laser was compared and analysed, the non-contacting infrared thermometer was taken to validate the result of the analysis. The related CW/pulsed laser process was compared and validate by the experiment of laser remanufacture forming. The result of the analysis and the test shows that, the optimized process parameters of laser remanufacture for pulsed laser are the 1.2kW laser power, the 3mm spot diameter, the 5mm/s scanning speed, the 3.2mm width of the forming layer, the 10ms pulse width, the 1:1 duty ratio. On the same condition of forming and heat dissipation, the temperature maximum of laser remanufacture molten pool is about 1400℃,it is 170 ℃ higher than the pulsed laser. The heat input and heat-affected zone for CW laser remanufacture is bigger than the pulsed laser remanufacture’s. The related process and methods could be taken for reference for the remanufacture of impeller blades.