Aiming at contradiction of tracking precision and energy consumption of target tracking in wireless sensor networks（WSNs）

an improved distributed particle filtering（PF） algorithm is proposed.It can keep the variety of the particles by adjusting likelihood distribution of filters and meanwhile the tracking mechanism is also improved

and it can adaptively adjust number of working sensor nodes in dynamic cluster according to the tracking precision.The simulation result shows that the proposed improved algorithm not only improve tracking quality but also reduces energy consumption and prolongs lifetime of network.