Based　on　laser　irradiation　processing　experiment　for　repairing　damaged　copper　thin　film　specimens,　the　effect　of　temperature　field　induced　by　pulsed　laser　surface　irradiation　on　fatigue　damage　repairing　of　copper　thin　film　was　studied　by　numerical　simulation　method.　First　the　temperature　field　of　copper　thin　film　after　laser　irradiation　was　analyzed　by　ANSYS　under　different　pulse　energies　and　pulse　numbers.　Then　the　surface　morphologies　of　copper　thin　film　specimens　were　observed　by　optical　microscope　before　and　after　laser　surface　irradiation.　The　results　showed　that　laser　irradiation　processing　has　a　better　effect　on　fatigue　damage　repairing　when　the　temperature　induced　by　laser　surface　irradiation　reaches　about　1200　degrees　C.　A　slightly　melted　morphology　on　the　surface　of　copper　thin　film　was　observed　in　this　case.　In　addition,　except　for　the　full　healing　of　fatigue　damage,　the　total　fatigue　life　was　increased　about　2　times　at　the　nominal　stress　level　of　120MPa.