Automatic sachet powder filling machine is suitable for filling device of semi-fluid pasty materials with poor fluidity such as viscous body, suspension and emulsified oil. This product is equipped with three-side or four-side sealing bag forming and precise positioning sealing and cutting system, which can achieve precise control of flow rate, automatic metering and automatic filling by means of piston stroke adjustment. It iswidely used in food, medicine, consumer goods and chemical industry full-automatic packaging.