Through　using　a　novel　micro-coating　metal　additive　manufacturing　(MCMAM)　process　in　this　study,　the　forming　characteristics　of　the　multilayer　single-pass　specimens　were　investigated.　The　forming　defects　including　the　porosity　and　the　bonding　quality　between　layers　were　analyzed.　Moreover,　we　also　attempted　to　study　the　effect　of　process　parameters　such　as　flow　rate,　deposition　velocity,　and　layer　thickness　on　the　forming　morphology.　Based　on　the　results,　the　optimization　of　process　parameters　was　conducted　for　the　fabrication　of　thin-wall　MCMAM.　Finally,　estimation　criteria　for　the　integrity　of　the　interfacial　bond　were　established.