Mechanical　properties　of　composite　T300-AG80　were　tested　under　laser　irradiation　at　room　temperature.　The　longitudinal　and　latitudinal　effective　elastic　modulus　and　the　tension-compression　failure　stresses　of　the　composite　were　obtained.　Laser　parameters　effects　on　mechanical　properties　of　the　composite　were　analyzed.　The　wavelength　of　continuous　wave　laser　Nd:YAG　is　1064nm　in　the　test.　Under　different　tension　-　compression　loading,　ablation　failure　mechanism　and　the　trend　of　mechanical　properties　influenced　by　different　intensity　laser　were　analyzed.　At　the　same　time,　the　experimental　process　of　ablation　was　observed　by　high　speed　camera　and　the　failure　time　of　the　specimen　was　got　through　it.　The　result　shown　that　the　orientation　of　carbon　fiber　affects　mechanical　properties　and　laser　ablation-resistance　remarkably.　Effective　elastic　modulus,　tension　-　compression　failure　stresses　of　longitudinal　are89GPa,　940MPa　and　507MPa　respectively.　Longitudinal　specimen　properties　are　56.3%,　70.6%　and　20.7%　respectively　more　than　that　of　the　latitudinal.　The　time　of　longitudinal　specimen　laser　ablation-resistance　is　distinctly　better　than　that　of　latitudinal　specimen　under　laser　irradiation　and　tension　loading.　The　failure　time　of　longitudinal　and　latitudinal　specimen　under　compression　loading　is　much　shorter　than　that　of　it　under　tension　loading.