Improvement　is　made　in　the　traditional　spectral　beam　combining　structure　by　adding　beam　shaping　element,　namely　BTS.　BTS　is　used　to　rotate　the　beam　from　the　emitter　in　semiconductor　laser　array.　The　slow　axis　light　distribution　of　each　emitter　becomes　vertical　distribution.　The　fast　axis　light　distribution　becomes　horizontal　distribution.　Spectral　beam　combination　is　conducted　by　external　cavity　after　beam　shaping　in　horizontal　direction.　The　effect　of　smile　is　reduced.　As　a　result,　the　overall　output　beam　quality　and　conversion　efficiency　is　improved　very　much.　A　standard　semiconductor　laser　array　is　used　in　this　experiment.　Output　power　of　70.01　W,　electro-optic　conversion　efficiency　of　52.8%　and　spectral　beam　combining　efficiency　of　92.2%　are　achieved.　The　spectral　line-width　is　7.7　nm.　M2　of　1.28　(0.4　mm　·　mrad)　in　horizontal　and　11.2　(3.5　mm　·　mrad)　in　vertical　are　obtained.　The　beam　quality　of　the　output　is　close　to　that　of　a　single　emitter　of　the　array　in　both　directions.