A 'hopper scale' for packaging systems with quantitative weighing capabilities. The box body of the scale is fixed on the foundation by several lifting lugs hanging weighing sensors. The feeding door of the box body is controlled by the PLC output to control the cylinder action. The feeding door has settings for coarse feeding and fine feeding to ensure weighing accuracy. Because its design is too complicated and cumbersome, there are many detection components, and the failure rate is high, it is often stopped due to the problem of 'glue blocking' caused by a failure in a certain link. It is time-consuming and laborious to clean the rubber in the scale, and the waste rubber produced will cause great losses. Therefore, it is considered to transform the feed hopper into a 'split' structure, which can be separated from the left and right sides. Through the above improvements, it can achieve fast processing, reduce downtime and maintenance time, and reduce production costs.