In order to obtain the mechanism of laser ablation on the electrical properties of quartz fiber/epoxy wave-transmitting material under high density heat flux condition, we utilize continuous laser as heat loading source to carry out laser ablation, and test the dielectric constant of the material. The thermal damage evolution behaviors of quartz fiber/epoxy wave-transmitting material are obtained by the TG-DSC analysis of epoxy resin and quartz fiber. The infrared absorption spectrum and the crystalline mat...