Silicon-based　surface-enhanced　Raman　scattering　(SERS)　substrates　with　high　sensitivity　and　uniformity　were　obtained　by　a　laser　surface　processing　method　utilizing　microsphere　sphere　lens　arrays　followed　by　chemical　etching　and　silver　(Ag)　deposition.　High　SERS　performance　of　these　substrates　was　demonstrated　by　their　enhancement　factor　of　up　to　8.2　x　10(7)　for　rhodamine　6G　(R6G)　as　well　as　their　ability　to　detect　1　nM　of　R6G　and　10　ppm　of　fenthion　by　a　rapid　drop-evaporation　detection　method,　A　dipole　superposition　plasmon　mode　due　to　a　novel　Ag　microflower　structures　formed　on　the　top　of　microvolcano　microstructures　fabricated　before　Ag　deposition　was　found　to　be　responsible　for　the　SERS　enhancement.　The　height　of　the　Ag　microflowers　was　not　determined　by　Ag　deposition　thickness　but　by　the　height　of　the　microvolcanoes,　which　could　be　easily　tuned　by　laser　power,　microsphere　size,　and　alkali　etching　time;　tunable　SERS　performance　was　also　achieved.　The　developed　approach　provides　a　cost-effective　way　to　prepare　large-area　3-D　solid　SERS　substrates　to　adapt　to　multiple　species　of　probe　molecules　and　different　excitation　wavelength　ranges　with　high　controllability　and　reproducibility.