The formulations of emulsion explosive made by loading machine were optimized to solve the problems such as low power, short storage and high pressure in transporting. The effect of sensitizing agent ratio,foaming time and emulsion matrix temperature on explosive density was studied, and the effect of emulsion matrix temperature on the transporting pressure of the pipeline was also studied. Results show that transporting pressure of the pipeline can be kept in a well-balanced condition and quality of emulsion explosive can be ensured when the explosive density is controlled in the range of 1.10-1.25 g·cm^-3, the sensitization agent mixture ratio is in the range of 1：15-1：30, the best foaming time is 15 min and the temperature of emulsion matrix must be controlled in the range of 40-50 ℃.