Validity and stability of information passed between receiver and transmitter are affected directly by the intensity and uniformity of magnetic field transmitted by electromagnetic induction devices in adjacent movement.Based on the electromagnetic induction fuze setting system in artillery and according to electromagnetic filed theory

theoretical analysis and numerical simulation is completed for the uniformity of magnetic field distribution in axial direction for current carrying solenoid of finite length.An optimal structure is proposed for fixed radial and axial size

and the results are verified by experiments.Experimental data is in good agreement with theoretical analy sis

which shows that the design is correct.Methods of design and experiment can be applied widely to other electromagnetic induction sets.