We　report　a　new　method　to　prepare　active　silica　fiber　preform　at　low　temperature,　not　exceeding　1300　degrees　C.　through　the　whole　process.　We　prefabricated　glass　parts　with　nano-porous　structure　by　UV　cure　equipment　and　debinded,　the　average　pore　diameter　is　about　46　nm.　To　prepare　the　active　fiber　preform,　several　different　concentrations　of　Yb3+　ions　were　impregnated　with　solution　doping　method　and　further　sintering　under　flowed　O-2.　After　several　hours　vitrification,　the　Yb3+-doped　silica　fiber　preform　with　0.05　wt%,　0.1　wt%　and　0.2　wt%　doping　concentration　were　produced,　and　the　size　of　the　final　fiber　preform　is　phi　3x39　mm.　Then　the　fiber　owning　an　Yb3+　concentration　of　0.1　wt%　was　drawn　by　rod-in-tube,　the　measurements　show　that　Yb3+　ions　are　homogeneous,　central　wavelength　is　1030　nm,　the　3　dB　linewidth　is　about　38　nm,　fluorescent　lifetime　is　1　ms,　the　fiber　has　absorption　from　Yb3+　7　dB/m　at　976　nm.　To　best　of　our　knowledge,　it　is　first　time　that　active　fiber　preform　is　produced　by　this　approach.