La2Zr2O7(LZO)　buffer　layer　was　prepared　on　the　cube　textured　nickel　alloy　substrate　with　the　nitrate　as　the　precursor　salts.　Combine　with　the　analysis　of　the　thermal　pyrolysis　property　of　the　precursor　salts,　and　the　study　of　epitaxial　growth　of　LZO　films　on　both　of　the　LAO　single　crystal　and　the　Ni5W　alloy　substrate,　a　optimized　processing　route　is　achieved,　which　is　two　step　heating　ways　at　low　temperature　together　with　the　ramp　heat　treatment　at　high　temperature.　It　is　concluded　that　the　pyrolysis　process　plays　the　most　important　role　in　the　texture　epitaxy.　The　orientation　analyses　reveal　the　formation　of　a　cube　texture,　with　the　FWHM　of　(222)　phi　scan　and　the　(400)　omega　scan　of　8.5　degrees　and　8.1　degrees,　respectively.　The　SEM　image　shows　the　dense　and　homogeneous　film　without　cracks　and　holes.　The　discussions　above　indicate　that　the　nitrate　route　is　feasible　for　the　preparation　of　the　LZO　buffer　layer.