Based on the problems of shipborne smoke screen passive jamming tactics and technology, incorporated with the present situation of liquid smoke screen multi-band passive jamming technology, the water mist multi-spectral and emulsion smoke screen jamming technologies and methods are researched. According to the physical properties and the factors affecting the stability of emulsion, the emulsion smoke screen multilayer structure jamming theory is put forward. The emulsion droplet multi-interface effect and different directional propagation characteristics are applied to the liquid smoke screen jamming. The new type of liquid smoke screen can effectively interfere in the visible, infrared and millimeter-wave wide band.