Electromagnetic launch technology is an inevitable trend among methods of launch in the future.The principle and technology characteristics of electromagnetic launch is analyzed,three branches of electromagnetic launch technology development overseas in electromagnetic ejection,electromagnetic railgun and electromagnetic pushing were studied,and the key technology of electromagnetic launch was summarized. Furthermore,the development strategy and the extension application prospect of electromagnetic launch technology was proposed.%电磁发射技术是未来发射方式的必然发展趋势。分析了电磁发射的原理和技术特点，研究了电磁弹射、电磁轨道炮、电磁推射三个技术分支的国外发展情况，概述了电磁发射的关键技术，并依此提出了发展思路及电磁发射技术的推广应用前景。
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