Using the wireless sensor networks to predicate the forest fires and locate the fire scene can prevent forest fires effectively or get the position as soon as possible.A DPE location algorithm which based on cluster is proposed.It clusters according to the incremental thinking of the DPE algorithm

and locates nodes simultaneously

so as to improve the accuracy of system positioning and network scalability and real time.Simulation result show when the allowable positioning error is within 5m

node positioning accuracy rate can reach 97%.