Brand extension has a great significance to a enterprise' development and expansion, and extension policy's right or wrong can directly influent enterprise's develpoment, even more existence. Hair's policy succeed in the organic combination of brand and deputy brand, bringing high market share and market occupancy rate, but excessive of brand extension and disadvantageous of brand protaction now are badly in need of solution for hair. Other inland enterprises are receiving inspiration from Hair's success, in the meantime, must pay attention to profession characteristic and stage of develpoment's influence to enterprise' diversification strategy, and old and new products' relevance and enterprise' personal resource status.Keywords: Brand, brand positioning, brand extension policy, Hair