We　investigate　an　all-fiber　all-polarization-maintaining　dispersion-managed　ultrafast　fiber　laser　mode-locked　by　nonlinear　polarization　evolution　in　polarization-maintaining　fibers　both　numerically　and　experimentally.　We　find　that　the　laser　can　operate　in　different　regions　among　a　wide　net　dispersion,　including　dispersion-managed　solitons,　dispersion-managed　dissipative　solitons,　bound　state　solitons　and　noise-like　pulses.　The　laser　generates　the　dispersion-managed　soliton　pulses　with　a　maximum　3　dB　bandwidth　of　37.84　nm,　which　can　be　further　compressed　to　161.37　fs.　Moreover,　pulses　generation　simulation　under　different　net　dispersion　condition　has　been　carried　out.　Nonlinear　pulse　evolution　dynamics　in　laser　cavity　has　been　analyzed　through　numerical　simulation　as　well.　The　results　are　basically　consistent　with　the　experimental　ones.　©　2020　Optical　Society　of　America　under　the　terms　of　the　OSA　Open　Access　Publishing　Agreement.