Quantitative weighting package machine

The utility model discloses a quantitative weighing package machine for powdery and granular materials. The quantitative weighing package machine has a machine frame, an electric control device, a vertical spiral feeding mechanism, a bag clamping mechanism and a weighting sensor. An elevating mechanism is also arranged on the machine frame, and is connected with the bag clamping mechanism through the weighting sensor. A discharge port of the vertical spiral feeding mechanism has a material closed door which is connected with a material door driving mechanism. The utility model has the advantages that no dust flies, the weighing operation is accurate, and precision is high when the utility model is used for weighing powdery and granular materials.