Fault　tolerant　topology　control　is　a　critical　problem　in　wireless　sensor　networks　(WSNs).　This　paper　proposes　a　PSO-based　k-connected　fault-tolerant　topology　control　algorithm　based　on　particle　swarm　optimization　(PSO),　called　KFTC-PSO.　This　algorithm　takes　both　the　issues　of　node　failure　and　power　efficient　into　consideration.　We　also　give　the　mathematical　model　of　the　k-connected　fault-tolerant　topology　control　problem　and　incorporate　the　principles　of　mutation　and　crossover　operator　in　genetic　algorithm　(GA)　to　achieve　a　better　diversity　and　break　away　from　local　optima.　The　simulation　results　show　that　this　proposed　algorithm　is　efficient.　©　2012　IEEE.