For uniform distributed wireless sensor networks（WSNs）

put forward an energy-balanced spiral routing algorithm based on mobile agent（EBSRMA）.At first

using directed diffusion method

the minimum hop gradient ring is established.Then

MA works from the outset loop and migrates based on shortest time delay strategy and priority visiting the outer loop strategy

and accomplishes the spiral routing by the way of visiting neighbor

marking trace and finding source.At last

MA will take the whole network data which are collected during migrating back to sink node.Simulation results shows that

by EBSRMA

the energy of network can be balanced effectively

the life of the network can be prolonged and the rate of data collection can be improved.Compared with DD routing algorithm

energy saving effect of EBSRMA is obvious.