Increasing　thickness　of　the　film　is　a　common　way　to　increase　superconductivity　of　Coated　conductor.　In　order　to　achieve　the　YBCO　coated　conductor　in　the　practical　application,　it　is　critical　to　improve　the　conductive　ability　of　YBCO　coated　superconductor.　In　this　paper,　Zr-doped　YBCO　film　was　researched　because　of　its　high　pinning　property.　With　low-cost　TFA-MOD　method,　on　LaAlO3　substrate　films　of　200　nm,　400　nm,　600　nm　and　800　nm　were　made　through　single,　double,　triple　and　four-times　coating,　and　their　microscopic　structure,　surface　morphology　and　superconducting　properties　were　studied.　Through　studying　the　relationship　of　thickness　and　critical　current,　we　found　that　under　thickness　of　600　nm,　Ic　of　these　films　become　higher　and　higher,　in　which　of　those　films,　Jc　of　single　film　reached　3.34　MA/cm2.　Ic　of　tirple-coated　film　reached　114.6　A/cm,　gotting　the　highest　value,　and　Jc　is　1.91　MA/cm2.　©　2016,　Chinese　Ceramic　Society.　All　right　reserved.