The influence of irradiation manner of a YAG-pulsed laser on the microstructure and cracking behavior of claddings was characterized. It follows that the microstructures of the cladding may not show a visible change after multi-irradiation with the YAG-pulsed laser beam,however,multi-irradiation do promote the appearance of cracking on claddings. The tendency of cracking of the same cladding may increase with the increase of the number of irradiation. The formed cracks show a feature of along grain boundary like hot cracking. Additionally,more heat input during the process may increase the tendency of initiation of the re-heat cracking in the substrate alloy as well.