Aiming at the problem such as node energy is limited

network cycle is short and the throughput is low

an energy-efficient wireless sensor networks routing protocol based on clustering is proposed. In initial stage

the improved K-means cluster are used to obtain network clustering. The cluster head selection is optimized by using the fuzzy comprehensive evaluation（ FCE） and analytic hierarchy process（ AHP） called FAHP

according to node energy

distance to base station

energy efficiency of node and other factors to optimize cluster head choise. In data transmission phase

construct multi-hop routing mode for node based on transmission distance

energy

hop number

which reduces the node energy consumption in data transmission effectively. Simulation results show that KAF has superior performance in reducing node energy consumption

extend network life cycle

increase network throughput

compared with LEACH-K

KPSO and other clustering routing protocols.