In this paper, utilizing the microfluidic cross-junction and high electric field to generate uniform emulsions is reported. Our strategy was based on flow-focusing for the formation of a series emulsions by changing ratio of disperse phase and continuous phase flow rate and by adding the electric field to control the emulsion size decrease. We found the size of the emulsion decreased as the electric filed and the ratio of continuous phase disperse phase flow rate and increased. Experimental data showed that the emulsions were quite uniform with standard deviation less than 10%. When adding the electric field, the Taylor cone is formed and the smaller Na-alginate em ulsions are generatee, the size of which is about 10 μm. Using the proposal electrospraying microfluidic chip, the alginate emulsion of smaller size could be obtained compare to the previous cross-junction shape researches.