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Production of GaN films by metal-organic chemical vapor deposition (MOCVD) is widely used way of the world. MOCVD production in China the concept and production equipment still have a gap with the international, so do not have the advantage of international competition. This article describes some results of GaN film grown on sapphire by MOCVD in recent year. author will discuss those results base on the order of process, hope to improve the quality of MOCVD GaN films by improve the process.