Abstract: In order to transform algorithm behavioral description to register transfer level structural description,a new power model and a low power design method based on network flow are proposed,where function unit power,interconnection power and voltage converting power are taken into consideration.For a given data flow graph,single voltage high level synthesis methods are run first,and then multi-voltage adjustment is done iteratively on the single voltage synthesis results.The network flow sub-graph needed to adjust is extracted from the previous network flow graph and the min-cost max-flow augmentation algorithm is run on it.Experimental results indicate that our method can optimize interconnection power,voltage converting power and total power substantially.