Laser　cladding　has　been　developed　as　a　useful　technology　to　modify　material　surface　in　industry.　In　this　paper　a　new　approach　of　surface　modification　is　introduced.　Depositional　Laser　Cladding　(DLC)　was　developed　and　the　different　mechanisms　were　investigated　during　the　manufacture.　Basing　on　particular　analysis　of　defects　in　the　experiment,　the　relation　between　the　quality　of　cladding　layer　and　laser　energy　density　is　manifested.　Depositional　effect　and　thermal　effect　play　their　roles　in　different　place　and　the　depositional　effect　provides　thin　layers　with　the　thickness　of　near　mean　particle　size.　Appropriate　parameters　of　laser　energy　can　promote　high　quality,　avoiding　pores　and　stacks　in　agglomeration　and　ebullition.　Controllable　low　thickness　near　mean　particle　size　and　sharp　edge　make　it　possible　to　be　used　on　producing　certain　shape　in　the　surface　engineering　field,　such　as　restoring　and　gradient　materials.