The　influence　of　transverse　mode　were　researched　with　the　injection　current　changing　via　experiments　conducted　with　980　unit　oxide-confined　vertical　cavity　surface　emitting　lasers　(VCSELs).　Based　on　the　spatio-temporal　rate　equation,　the　injection　parameter　dependence　of　the　transverse　mode　characteristics　of　weak-index　guiding　VCSELs　were　theoretically　researched　by　integrating　the　spatially　dependent　part.　The　result　of　the　experiment　indicated　that　the　higher-order　modes　begin　to　emerge　and　exhibit　strong　competition　with　the　injection　current　increased　when　the　oxidized　aperture　was　kept　unchanged,　and　the　distribution　of　the　carrier　transfers　from　the　center　to　the　edge.　Furthermore,　the　main　order　becomes　weaker　because　of　the　spatial　hole　burning.　Compared　with　the　appearance　of　higher-order　modes　with　different　oxidized　aperture,　the　small　injection　aperture　exhibits　better　single　mode　behavior.