Ground wire design is the important part for the whole system of anti tank missile electricity design. The thesis has been analysed according to compatible theory of electromagnetism opposing the mechanism that the various electromagnetism interference produces in tank guided missile electrical system, has been tied in wedlock and antitank guided missile electrical system concrete conditions, different specifically for electromagnetism interference mechanism creation cause, adopt different from resisting electromagnetism interference design procedures, at last has brought forward the dominant ideas that ground wire designs systematically. Provides the dominant ideology and the concrete method of ground wire design combining the engineering practices of the system of anti-tank missile electricity design according to the related theories of electromagnetic compatibility, proposing the prospect.