High　repetition　rate,　large　energy　and　narrow　pulse　width　laser　is　widely　used　in　the　frontier　fields　of　laser　imaging,　laser　machining　and　precision　measurement.　Using　the　technology　of　electro-optical　cavity-dumped　and　double　rod　series　structure,　which　reduces　the　thermal　lens　effect　and　ensures　the　good　matching　mode　of　oscillation　light　and　the　pump　light,　the　1064　nm　linearly　polarized　laser　output　with　high　efficiency,　large　energy　and　narrow　pulse　width　is　realized.　Using　the　barium　boron　oxide　(BBO)　Pockels　cell　as　electro-optical　switch,　and　the　914　nm　fiber-coupled　semiconductor　laser　with　low　absorption　coefficient　is　used　to　pump　the　Nd:YVO4　crystal.　Thus　the　thermal　stability　of　the　laser　is　improved.　At　the　repetition　rate　of　7　kHz　and　the　crystal　absorption　power　of　79.6　W,　a　stable　pulse　laser　output　with　a　pulse　width　of　5　ns,　maximum　average　output　power　of　35　W,　and　a　single　pulse　energy　of　5　mJ　is　obtained,　and　the　corresponding　optical　conversion　efficiency　is　44%.　©　2018,　Chinese　Lasers　Press.　All　right　reserved.