A non-magnetic heating film technology for atomic cells is introduced. To ensure sufficient atomic number density, the working temperatureofatomic cells isusuallybetween80~120 ℃, makingnon-magneticheatingtechnology one of the core technologies of thermal atomic clocks. The multi-physics finite element simulation analysis is used to analyze the steady-state magnetic field distribution generated by the energized coil under small current conditions(0.2A DC). By comparing the magnetic field distribution generated by different coil structures, the coil structure that meets the performancerequirementsisobtained.Theexperimentalresultsshowthatthenon-magneticheatingfilmwiththeoptimized structure generates a residual magnetic field of less than 100 nT, meeting the requirements of non-magnetic heating for atomiccells. Thedesigninthisarticleprovides areferencefortheoptimizationandimprovementoftheatomiccelldesign and operating parameters of thermal atomic clocks based on atomic vapor, providing a reliable guarantee for the miniaturizationandperformanceimprovementofthermalatomicclocks.