The　feasibility　of　using　food　waste-recycling　wastewater　as　fermentation　substrate　for　producing　liquid　phosphate-solubilizing　bacillus　megaterium　fertilizer　was　investigated.　The　results　showed　that　bacillus　megaterium　cultured　in　the　food　waste-recycling　wastewater　reached　logarithmic　growth　stage　in　as　short　as　3~4　days　of　adaptation　period,　and　the　number　of　strains　reached　the　maxima　on　the　6~7th　day.　The　wastewater　II　generated　from　hydrothermal　pre-treatment　was　more　suitable　to　be　the　fermentation　substrate　than　wastewater　I.　The　strain　numbers　cultured　in　wastewater　II　was　5times　of　what　was　cultured　in　wastewater　I　(4.8×1015　CFU/mL).　Salt　concentration　in　the　wastewater　had　great　influence　on　the　growth　and　metabolism　of　Bacillus　megaterium:　the　strain　numbers　first　increased　and　then　steeply　decreased　with　the　increase　of　NaCl　concentration,　indicating　that　the　optimal　NaCl　concentration　for　bacterial　culture　was　10　g/L.　The　variation　of　pH　and　temperature　affected　the　growth　of　bacillus　megaterium　significantly,　while　shaking　speed　and　strain　inoculation　volume　were　not　key　influencing　factors.　The　optimal　culture　conditions　were　pH　8,　T=35,　shaking　speed　80r/min,　and　inoculums　of　2%　(V/V)　as　determined　by　orthogonal　experiment.　Phosphatesolubilizing　fertilizer　prepared　by　food　waste-recycling　wastewater　was　able　to　achieve　effective　phosphating　of　immobilized　phosphorus:　the　dry　weight　of　soy　beans　grown　in　soils　amended　with　0.025‰~2.5‰　of　phosphatesolubilizing　fertilizer　was　70.7%~84.5%　of　that　grown　in　the　soil　amended　with　5%　of　inorganic　fertilizer　on　weight　basis.　Moreover,　the　optimal　amended　ratio　of　the　microbial　fertilizer　was　0.25‰.　©　2016,　Editorial　Board　of　China　Environmental　Science.　All　right　reserved.