A　super-resolution　quantitative　phase-contrast　imaging　method　using　high　refractive　index　microsphere　is　developed　to　overcome　the　diffraction　limit　of　optical　field,　which　is　produced　by　the　object　in　the　digital　holographic　microscopy.　A　microsphere　placed　on　the　surface　of　the　object　can　collect　the　underlying　near-field　information,　which　appears　as　the　evanescent　waves　and　transforms　them　into　propagating　waves.　Due　to　the　spherical　symmetry　provided　by　the　microsphere,　the　super-resolution　of　the　imaging　system　can　be　realized　in　all　directions　at　the　same　time　with　one-shot　recording.　The　experiments　are　carried　out　for　a　cosine　grating　with　the　line　width　of　255　nm　as　the　object,　which　confirms　that　the　lateral　resolution　can　be　less　than　lambda/2.　Meanwhile,　the　quantitative　phase-contrast　image　is　experimentally　obtained.　The　reconstructed　complex　field　distribution　provides　the　great　flexibility　with　the　digital　processing　for　the　microscope　imaging,　such　as　the　ability　of　refocusing　and　numerical　reconstruction.　(C)　2017　Society　of　Photo-Optical　Instrumentation　Engineers　(SPIE)