In order to make the properties of emulsion explosive satisfy the requirements of explosive welding, emulsion matrix, foam and carbonate mineral powder were mixed to prepare a kind of emulsion explosive with low detonation velocity.The microstructure, fluxion property and mechanical sensitivity were tested, the effect of charge diameter on detonation velocity was studied, and the explosive welding test on stainless steel-steel plate was tested.Results show that the internal of explosive have interspaces, shapes of particle are irregular, and have a good fluxion property, and the sensitivities of impact and friction are both zero.When the loading density of explosive is 0.81 g·cm^-3, the actual measured brisance is 9.71 mm, and when the charge diameter is 16-50 mm, the detonation velocity is 1754-2439 m·s^-1.The explosive can satisfy the requirements of explosive welding of metal plate.