In　this　paper,　we　consider　the　fault-tolerant　concave　facility　location　problem　(FTCFL)　with　uniform　requirements.　By　investigating　the　structure　of　the　FTCFL,　we　obtain　a　modified　dual-fitting　bifactor　approximation　algorithm.　Combining　the　scaling　and　greedy　argumentation　technique,　the　approximation　factor　is　proved　to　be　1.52.