HPW/BMMs　catalyst　was　prepared　by　supported　phosphotungstic　acid　on　mesoporous　SiO2　with　two　different　mesoporous　structures　via　impregnation　method,　and　characterized　by　means　of　XRD,　FTIR.,　nitrogen　adsorption-desorption,　TG　and　SEM.　The　effects　of　solvents,　such　as　water,　ethanol,　acetone　and　acetonitrile,　on　the　structure　and　properties　of　supported　phosphotungstic　acid　were　systematically　investigated.　The　results　showed　that　the　mesoporous　structures　of　BMMs　were　maintained　in　the　catalysts　synthesis　process,　however,　the　mesopores　order　degree,　surface　area　and　pore　volume　of　the　catalysts　(HPW/BMMs)　decreased　as　the　increase　of　HPW　loading.　A　new　HPW　species　in　HPW/BMMs　appeared　at　lower　loadings　and　disappeared　as　the　increasing　of　HPW　amount.　In　addition,　the　influence　of　aqueous　solution　on　the　Keggin　structure　of　HPW　in　HPW/BMMs　was　remarkable,　although　the　HPW　crystal　remained　intact　with　the　uniform　dispersion.　The　acid　density　of　the　catalyst　synthesis　in　water　with　40%　HPW　loading　(40HPW/BMMs-WA)　was　up　to　1.381　mu　mol/m(2).　In　contrast,　when　acetonitrile　was　used　as　solvent,　the　Keggin　structure　of　HPW　was　more　likely　to　be　maintained,　but　the　HPW　crystal　phase　was　severely　destroyed　with　a　low　dispersing　inside　the　mesoporous　channels.　In　comparison,　the　effects　of　ethanol　and　acetone　as　solvent　were　not　obvious.　Furthermore,　the　acid　reduced　performances　of　the　HPW/BMMs　catalysts　in　etherification　reaction　between　waste　oils　and　methanol　were　preliminarily　investigated.