In　this　paper,　a　small　air-cooled,　heat-dissipating　VCSEL　end-face　pumped　disc　laser　is　designed,　which　is　end-face　pumped　with　Nd:　YVO4　crystal　in　VCSEL　arrays.　The　pump　source　and　gain　medium　are　mounted　on　the　same　heat　sink,　and　the　water-cooled　and　air-cooled　heat　dissipation　systems　are　compared　and　simulated　by　ANSYS　and　Flow　Simulation　software,　respectively,　which　verifies　the　feasibility　of　the　air-cooled　heat　dissipation　model;　an　aspherical　lens　is　designed　to　complete　the　collimation　of　the　VCSEL　array　by　ZEMAX,　and　the　dispersion　angle　of　the　X　and　Y　directions　after　the　collimation　is　0.47°;　A　parabolic　reflecting　focusing　mirror　is　designed　to　collect　the　collimated　beams,　and　the　size　of　the　focused　spot　is　1.52mm×1.52mm.　The　heat　sink　is　optimised　by　flow　simulation,　and　the　best　heat　dissipation　effect　is　obtained　with　the　parameters　of　fin　thickness　of　2mm,　fin　height　of　37mm　and　fin　spacing　of　3mm.　The　overall　design　of　the　air-cooled,　heat-sink　VCSEL-pumped　disc　laser　is　carried　out　by　Soilworks,　and　the　overall　dimensions　of　the　laser　are　120mm×90mm×90mm　(length×width×height)　(of　which　the　length　of　the　heat-sink　system　is　40mm).　©　2023　SPIE　·　0277-786X.