In order to solve the problems of large thermal deformation and poor processing quality in metal film processing,a micromachining technology based on nanosecond laser was proposed.The vaporization mechanism and heat conduction theory of laser processing were analyzed;taking aluminum foil as an example,the ABAQUS constitutive model was established,and the thermal deformation law was simulated and analyzed;based on the nanosecond laser experimental platform,the aluminum foil was engraved to study the influence of different processing parameters on the surface quality of the workpiece.The results show that in the early stage of laser loading,the effect of pulsed laser on the vaporization of the material is more obvious;with the increase of laser loading time,the heat affected area increases gradually;the groove depth decreases gradually with the increase of heat source moving speed,and increases gradually with the increase of laser power;the average error of simulation and experiment is less than 5%.The research results are helpful to the development of the nanosecond laser processing technology.