In　this　study,　a　series　of　butt　welding　tests　with　oscillating　fiber　laser　beams　were　performed　on　zinc-coated　thin　sheets　of　0.8　and　1.2　mm　thicknesses.　The　optimized　welding　parameters　were　used　to　produce　robust　welds　with　no　perforations　or　pores.　The　weld　formation　process,　microstructure,　and　mechanical　properties　of　welded　joints　with　the　butt　surfaces　processed　via　laser　and　shear　cutting　techniques　were　systematically　investigated.　Besides,　the　corrosion　resistance　of　the　laser　oscillating　welded　joint　was　analyzed　in　detail.　The　welded　joint　with　the　butt　surface　processed　by　laser　cutting　shows　less　undercutting　degree　with　a　more　favorable　weld　appearance.　The　two　welded　joints　had　similar　microstructures　containing　different　forms　of　ferrites.　The　heat-affected　zone　was　almost　identical　to　the　base　metal　in　microstructure　but　had　larger　grains.　Widmanstatten　ferrites＇　content　in　the　large-grained　weld　metal　of　welded　joints　with　surface　processed　via　laser　cutting　exceeded　that　of　shear　cutting-processed　ones.　The　former　had　lower　tensile　strength　than　the　latter,　but　their　overall　mechanical　performance　was　better　than　base　metal.　After　salt　spray　corrosion　and　electrochemical　corrosion　tests,　the　laser　oscillating　welded　joint　was　only　slightly　corroded　and　exhibited　no　obvious　deterioration　in　corrosion　resistance.