Microstructure　and　texture　characterization　in　Nd:YAG　laser　welds　of　5A90　Aluminum-Lithium　(Al-Li)　alloys　were　studied　by　means　of　optical　microscope　(OM),　electron　back　scattered　diffraction　(EBSD)　and　transmission　electron　microscope　(TEM).　The　solidification　structure,　misorientation　angle,　dislocation　density　and　microtexture　of　the　welds　in　5A90　Al-Li　alloys　were　investigated　and　compared　with　the　unaffected　base　metal.　The　results　show　that　microstructure　and　texture　changes　of　the　5A90　Al-Li　alloy　after　laser　welding.　The　solidification　structure　results　show　that　a　zone　of　equiaxed　grains　(EQZ)　along　the　fusion　boundary　is　formed　and　the　weld　metal　exhibits　entirely　equiaxed　dendritic　grains　for　5A90　Al-Li　alloy.　EBSD　study　clearly　shows　the　high　angle　boundaries　(＞15　degrees)　and　microtexture　changes　for　5A90　Al-Li　alloy　after　laser　welding.　TEM　images　indicate　that　the　laser　welding　has　no　influence　on　the　dislocation　density.