Energy　efficient　is　critical　issue　for　wireless　sensor　networks　(WSNs).　LEACH　achieves　network　energy　balance　via　randomly　selecting　cluster　heads　periodically.　In　this　paper,　we　propose　hierarchy　tree　routing　based　on　LEACH　(HT-LEACH).　The　algorithm　defines　three　phrases　in　each　round:　cluster　formation,　hierarchy　tree　routing　formation　and　steady-state.　In　the　second　phrase,　hierarchy　tree　routing　is　built　in　cluster　heads.　Simulation　has　been　done　in　MATLAB　and　the　results　show　that　the　proposed　algorithm　has　a　better　performance　in　balancing　nodes　energy.　©　2013　IEEE.