In　order　to　reconstruct　the　three-dimensional　information　of　the　hologram　recorded　by　pre-magnification　digital　micro-holography　(PMDMH)　fast　and　accurately,　the　method　of　phase　compensation　in　pre-magnification　digital　micro-holography　with　reference　wavefront　curvature　as　same　as　the　object　is　studied　theoretically　and　experimentally.　The　point　spread　function　(PSF)　is　derived,　and　then　the　expression　of　reconstructed　light　field　amplitude　and　phase　aberration　is　obtained.　And　it　is　proposed　that　the　real　phase　distribution　of　sample　can　be　obtained　by　using　phase　mask　to　pre-compensate　the　phase　aberration　at　first,　followed　by　unwrapping　phase　and　lastly　combining　with　automatic　phase　compensation.　The　red　blood　cells　are　used　as　the　experimental　sample,　and　the　result　shows　that:　using　phase　mask　to　pre-compensate,　on　one　hand,　the　error　in　phase　wrapping　can　be　avoided,　and　on　the　other　hand,　it　can　also　effectively　eliminate　the　secondary　phase　distortion　by　single　automatic　phase　compensation　method.　(C)　2015　Elsevier　GmbH.　All　rights　reserved.