We　propose　a　fiber-solid　hybrid　amplifier　system　which　consists　of　a　semiconductor　saturable　absorber　mirror　(SESAM)　mode-locked　fiber　seed　with　pulse　width　of　10.6　ps　and　repetition　rate　of　17.6　MHz,　a　two-stage　fiber　pre-amplifier　and　a　Nd:　YAG　regenerative　amplifier.　This　structure　not　only　endures　high　peak　power,　but　also　reduces　the　influence　of　fiber　nonlinear　effects.　In　the　regenerative　amplifier,　a　Pockels　cell　made　up　of　BBO　crystal　is　used　as　the　electro-optical　Q　switch.　It　can　effectively　amplify　the　fiber　seed　source　while　keeping　the　beam　quality　constant.　Besides,　the　pulse　frequency,　round　trip　time　and　thermal　lens　effect　of　the　regenerative　amplifier　are　considered　and　the　stability　of　the　high　repetition　rate　regenerative　cavity　is　further　improved.　The　system　achieves　average　powers　of　1.5,　2.5,　3.4　W　at　the　repetition　rates　of　1,　3,　5　kHz,　corresponding　to　single　pulse　energies　of　1.5,　0.83,　0.68　mJ　respectively.　And　the　beam　quality　factor　M-2　reaches　1.5　at　the　output　power　of　3.4　W.　This　system　will　make　significant　contributions　to　many　fields　such　as　material　micro-processing,　laser　ranging,　and　laser　detection.　To　make　it　more　systematizing　and　engineering,　we　design　an　engineering　prototype　of　the　fiber-solid　hybrid　amplifier　system.