In order to avoid the thermal ablation destruction induced by the laser weapon, a thin layer of liquid metal is sandwiched into the hybrid structure shell. The unique merit of this hybrid structure lies in the excellent characteristics of liquid metal in thermal conductivity and flow to rapidly dissipate the thermal energy accumulated at the radiation spot. To evaluate and understand the practicability of this defensive measure against the intense laser, a comprehensive investigation on the suitability of using liquid metal is performed to sustain the thermal ablation damage. Numerical simulations are performed on three-dimensional heat transfer problems in the composite structure embedded with liquid metal. It is found that the new method can effectively reduce the temperature at the shell surface, which subsequently delays the softening process, and then achieves a powerful ability to withstand the intense laser. The strategy is expected to be useful in a variety of anti-laser systems.