To improve the energy utilization ratio of explosives in explosive welding, the honeycomb aluminum structure emulsion explosive and the multidimensional constraint charge way of cover plate arranged on the upper end of honeycomb aluminum structure emulsion explosive were used. The multidimensional constraint of honeycomb structure and cover plate weakens the effect of rarefaction wave in air on the detonation of explosive, reduces the critical diameter of explosive detonation and improves the work ability of explosive driving flyer plate.Taking 304 stainless steel and Q235 steel as flyer plate and base plate respectively, the contrastive explosive welding tests of multidimensional constraint charge and bare charge of ordinary emulsion explosive were carried out. The explosive welding window and the influence of the cover plate on the impact velocity of the flyer plate were theoretically analyzed by Gurney model. Results show that compared to the existing explosive welding technology, the bonding quality is obviously improved and the consumption of explosives is reduced by 50% and the energy utilization ratio of explosives is significantly improved. The impact velocity of the flyer plate increases with the increase of the quality of the cover plate, but the increase rate decreases. In addition, the explosive welding window is obtained and the welding quality is predicted, and the experimental results are in good agreement with predicted ones.