—As WSN is a resource-constrained network,

especially the limited energy, so it must maintain smaller

router information and reduce the energy consumption as

much as possible. This paper briefly introduces the wireless

sensor network, and analysis the problems existed in

LEACH routing protocol. Put forward the improved

algorithm based on LEACH cluster head multi-hops

algorithm, and under considering the premise of node

energy, consider the optimum number of cluster head and

selecting cluster node ,and through the use of limiter the

number of nodes in each cluster to balance the energy

depletion of each node. It could balance energy

consumption and prolong the lifetime of sensor network

through the use of algorithm. Emulation result indicates it

is effective.-—As WSN is a resource-constrained network,

especially the limited energy, so it must maintain smaller

router information and reduce the energy consumption as

much as possible. This paper briefly introduces the wireless

sensor network, and analysis the problems existed in

LEACH routing protocol. Put forward the improved

algorithm based on LEACH cluster head multi-hops

algorithm, and under considering the premise of node

energy, consider the optimum number of cluster head and

selecting cluster　node ,and through the use of limiter the

number of nodes in each cluster to balance the energy

depletion of each node.　It could balance energy

consumption and prolong the lifetime of sensor network

through the use of algorithm. Emulation result indicates it

is effective.