The temperature rising and distribution of silicon material irradiated by laser are researched for reducing the influence of heat effect. A fiber continuous laser is used as a light power to irradiate silicon material surface to record the temperature rising and distribution of silicon material under different laser power density and irradiation time. And experimental data is obtained. According to experimental conditions and parameters, simulation and calculation are performed to get the temperature distribution model of silicon material under laser irradiation. The simulation data of the model accords with the experimental results. Laser cutting simulation experiment can be performed through correcting the parameters of the model, which provides experimental reference for parameter choosing during laser cutting.