In order to explore a continuous， safe and controllable microfluidic synthesis strategy of emulsion explosive， silicon-based microporous array chips with four apertures（10 μm，20 μm，30 μm，40 μm） were designed and prepared by MEMS technology， and the microfluidic reaction device of emulsion explosive was constructed. It is found that the main factors affecting the droplet size of dispersed phase in latex matrix are micropore diameter and continuous phase velocity. The effects of pore size and oil-water two-phase flow rate on the particle size distribution and exothermic properties of emulsion droplets were studied. The results show that the particle size distribution of dispersed droplets in the matrix is the narrowest when the pore size is 30 μm and the continuous phase flow rate is 0.5 mL·min^-1 and D₅₀=8.169 μm. Microporous array chip can generate highly homogeneous droplets in batch， which provides a new choice for emulsification in the preparation of emulsion explosive.