With　the　help　of　self-designed　magnetic　field　generator,　beryllium　bronze　as　the　substrate,　Fe-Ga-Al-Y　magnetostrictive　film　(MF)　samples　were　prepared　under　different　static　magnetic　field　environments　by　ion　beam　sputter　deposition　(IBSD),　whose　composition　is　Fe　74.34~79.33　Ga　11.45~13.73　Al　5.33~6.95　Y　3.27~4.36　.　The　surface　morphology　of　Fe-Ga-Al-Y　MF　was　observed　by　atomic　force　microscopy　(AFM)　and　scanning　electron　microscopy　(SEM).　The　deflection　of　cantilever　and　hysteresis　loop　of　films　was　measured　by　laser　micro-displacement　sensor　and　alternating　gradient　magnetometer,　respectively.　The　surface　morphology　of　Fe-Ga-Al-Y　MF　and　the　effect　of　the　direction　and　size　of　the　static　magnetic　field　applied　during　deposition　on　magnetic　properties　of　the　films　were　studied.　The　results　show　that　the　thin　film　samples　prepared　by　IBSD　method　have　smooth　surface,　no　obvious　defects,　and　the　structure　of　the　thin　film　is　uniform　and　compact.　The　easy　magnetization　axis　direction　of　films　can　be　regulated　by　static　magnetic　field　applied　during　film　formation.　The　easy　magnetization　axis　direction　of　Fe-Ga-Al-Y　MF　is　the　same　as　the　direction　of　the　static　magnetic　field　applied　during　film　formation.　When　the　direction　of　static　magnetic　field　applied　during　film　formation　is　parallel　to　the　minor　axis　direction　of　the　substrate,　it　can　significantly　improve　the　saturation　magnetostrictive　properties　of　the　Fe-Ga-Al-Y　MF.　With　the　increase　of　magnetic　field,　the　saturation　magnetostriction　coefficient　of　film　has　been　continuously　improved;　the　saturation　magnetization　and　coercive　force　of　the　films　within　the　film　plane　(along　the　x-axis　direction,　y-axis　direction)　gradually　increase.　©　2018,　Science　Press.　All　right　reserved.