The　hydrostatic-driven　power　generation　system　is　suitable　for　the　development　of　unstable　natural　flow　energy　such　as　wind　energy　and　water　flow　energy.　Its　principle　is　similar　to　which　of　the　steam　turbine　power　generation,　and　they　are　both　belong　to　constant-speed　and　constant-frequency　power　generation　system.　In　order　to　achieve　faster　and　more　accurate　grid-connected　control　requirements,　the　constant　speed　control　of　the　hydrostatic-driven　power　generation　system　is　more　challenging　than　which　of　the　steam　turbine　,　because　the　steam　energy　of　the　steam　turbine　is　controllable　while　the　natural　flow　energy　is　random　and　unstable.　Taking　the　fixed　displacement　pump-variable　motor　hydrostatic-driven　power　generation　system　as　the　research　object,　the　transfer　function　of　the　mathematical　model　of　the　hydraulic　main　drive　system　is　analyzed.　According　to　the　factors　that　influence　the　constant　speed　output　control　precision　and　response　speed　of　the　variable　motor　under　the　disordered　input　condition　,　the　feed　forward　fuzzy　adaptive　PID　anti-interference　grading　control　method　is　proposed.　The　effectiveness　of　the　control　method　is　validated　by　simulation　and　experiment,　which　lays　a　foundation　for　further　research　on　the　hydrostatic-driven　power　generation　system.　©　2019　IEEE.