This fully automatic single-head rotor pump filling machine (with formula hopper mixing) is specifically designed for materials containing particles, high viscosity, and easy settling. The square hopper storage tank has a built-in mixing device that continuously agitates sauces or suspensions, preventing stratification and sedimentation. It employs a positive displacement rotor pump with servo drive to ensure high filling accuracy and no dripping. The entire machine meets food-grade hygiene standards, supports CIP cleaning, and is particularly suitable for automated quantitative packaging of difficult-to-handle materials such as hot pot base, meat sauce, and salad dressing.