Vertical　cavity　surface　emitting　lasers　(VCSELs)　have　been　widely　used　in　optical　recognition,　optical　communication,　optical　storage　and　other　fields　owing　to　their　unique　circular　symmetrical　spot,　small　volume　and　ease　of　high　density　array　integration.　In　this　paper,　with　the　array　beam　collimated　by　compound　lens,　the　beam　distribution　and　far-field　characteristics　of　VCSEL　array　are　analyzed.　In　addition,　the　beam　quality　characteristics　of　VCSEL　array　are　also　studied,　and　the　effects　of　different　lenses　combinations　on　the　beam　divergence　angle　and　spatial　coherence　of　VCSEL　array　are　compared　and　discussed.　The　results　show　that　the　divergence　angle　of　VCSEL　array　gradually　increases　with　the　increase　of　injection　current,　while　the　spatial　coherence　of　VCSEL　array　decreases.　For　the　10　×　10　VCSEL　array　with　an　oxidation　aperture　of　10　um　and　a　center　distance　of　130　um,　when　working　at　200　mA,　the　beam　divergence　angle　decreases　from　21.8°　to　0.2°,　the　beam　coherence　increases　from　0.556　to　0.861,　and　the　coherence　increases　by　54%　after　collimation　by　the　composite　lens,　which　is　of　great　significance　to　improve　the　application　of　VCSEL　array　light　source　in　free　space　coherent　detection　and　optical　communication.　©　2022　SPIE.