We　demonstrate　a　self-started,long-term　stable　polarization-maintaining　mode-locked　fiber　laser　based　on　the　nonlinear　polarization　evolution　technique.A　polarized　beam　splitter　is　inserted　into　the　cavity　of　the　linear　polarization-maintaining　fiber　laser　to　facilitate　self-started　mode-locking.Pulses　with　single　pulse　energy　of　26.9　nJ　and　average　output　power　of　73.9　mW　are　obtained　at　the　pump　power　of　600　mW.The　transmission　characteristics　of　artificial　saturable　absorber　used　in　this　laser　are　analyzed　theoretically,the　influence　of　the　half-wave　plate　state　on　mode-locking　is　discussed,and　the　mode-locking　range　is　obtained,which　is　well　consistent　with　the　experimental　results.