The invention discloses a machining technology for a file tooth stripe. The machining technology comprises the following steps that work zero positions of an X-axis axial drive device, a Z-axis axialdrive device and an S-axis axial drive device of a file numerical control tooth chopping machine are determined, and work is started after zero returning; the X-axis axial drive device is used for driving a file blank to move in the horizontal axial direction, the S-axis axial drive device is used for driving a chopping cutter to reciprocate so as to chop and press the file blank so that file teeth can be formed, and the Z-axis axial drive device is used for driving and adjusting the height of a chopping cutter base in the vertical direction; when the chopping cutter of the file numerical control tooth chopping machine works to the file blank width changing section, the Z-axis axial drive device is utilized for driving the chopping cutter base to form the height corresponding to the profiling amount in the vertical direction according to the profiling amount; the profiling amount is in the length range of the file blank width changing section and changes from 0 to N; and 0 presents theinitial height position of the chopping cutter base at the work zero time, and N represents the difference value between the finial height position and the initial height position of the chopping cutter base.