The　performance　of　reinforced　concrete　slabs　strengthened　with　high　strength　steel　wire　mesh　at　different　prestress　levels　of　a　new　tension　and　anchor　system　is　studied.　Three　slabs　reinforced　with　high　strength　steel　wire　mesh　at　different　prestress　levels　were　tested　and　compared　with　one　original　reinforced　concrete　slab　and　one　non-prestressed　reinforcement　slab.　Test　results　show　that　the　load-bearing　capacity　and　the　flexural　stiffness　of　the　slabs　strengthened　with　prestressed　steel　wire　mesh　were　greatly　improved　and　the　crack　width　was　obviously　reduced　if　compared　with　the　original　slab.　Comparing　with　the　non-prestressed　reinforcement　slab,　the　load-bearing　capacity　and　the　flexural　stiffness　of　the　slabs　strengthened　with　prestressed　steel　wire　mesh　were　increased,　the　cracking　load　was　significantly　increased,　and　crack　width　decreased.　By　raising　the　prestress　level　of　steel　wire　mesh,　the　reinforcement　effect　and　the　efficiency　of　utilizing　the　steel　wire　strength　was　improved.　The　prestress　loss　of　steel　wire　was　analyzed,　and　formulas　were　proposed　to　predict　the　load-bearing　capacity　of　reinforced　concrete　slabs　strengthened　with　different　prestress　levels　of　steel　wire　mesh.　The　theoretical　results　agree　well　with　the　experimental　ones,　and　can　be　used　for　theoretical　analysis　and　design　of　prestressed　steel　wire　mesh　for　strengthening　concrete　structures.　The　prestressed　steel　wire　reinforcement　technology　is　an　effective　reinforcement　technique,　because　it　can　resolve　the　defects　of　strain　lag,　peeling　of　the　strengthened　layer　and　the　low　level　of　utilizing　the　strength　of　steel　wire.