The work aims to develop a fully automatic corrosive solution filling machine, so that the workers can be far away from the harm of chemical products. In the filling system, all parts in contact with the liquid were made of high molecular plastic with excellent corrosion resistance, especially the filling valve, as it broke the traditional design concept of metal filling valve, and it was the plastic filling valve opened by valve-stem moving down. The chain of the conveyor was arranged in the tray groove of the weighing device, and the chain and the tray did not interfere with each other. The chain was provided with connecting-rod push plate. The corrosive solution filling machine had strong corrosion resistance. The connecting-rod push plate could prevent sudden acceleration of packaging buckets at the end of the conveyor, thus solving the problem of splashing materials of packaging bucket. The corrosive solution filling machine has the advantages of high automation, high safety performance, reasonable structure, simple operation, low cost and so on. It successfully solves the problem of difficult filling of corrosive solution in chemical industry.