Abstract: In order to study the effect of laser parameters on the mass ablative rate of the carbon f iber reinforcedsilicone modified epoxy resin composite , laser irradiation experiment s of the composite were carried out by a highpower CO₂ laser with different laser parameters. The effect of the irradiation time , laser intensity and spot diameteron the mass ablative rate of carbon f iber reinforced silicone modified epoxy resin composite was analyzed respectively. The result s indicate that the mass ablative rate of the composite is not greatly affected by the laser irradiationtime , but affected by the laser intensity and spot diameter. The mass ablative rate of the composite increases whenthe laser intensity and spot diameter are increased.