Laser processing has a distinct dualit y-“cold machining” and “hot machining”.In the research of femtosecond laser machining amorce,the “hot machining” must be strictly controlled to ensure th e safty of machining process and realize fine machining.In this paper,the axial and radial temperature distribution of B/KNO_3amorce ablated by a single pulse laser radiation were simulated by ANSYS. The results showed that the shock temperature of the sample surface is up to 3337℃.The machining safty is discussed theoretically,and the radius of heat affected zone of amorce after a single femtosecond laser pulse ra diation is about 4μm and the ablation depth is about 0.6μm.The ablation mechanism is analyzed through exper iments,and the ablation threshold of the amorce is calculated to be 0.284J/cm 2.