Barrel water bag inserting filling machine is applied to three gallons, five gallons barrelled water filling machine. Principle:The roll plastic wrap which blown by high temperature，is in accord with national food hygiene requirements. Sterile plastic wrap hand up on the rack of the machine, then pass to the sealing membrane and incise membrane institution by the trim membrane institution to cut into bag. After that the plastic bag will be open and put into the bucket by the manipulator, and then filling. The bag will warp the side of bucket automatically then the production is finished after capping. It’s completely automatic without the operation of human which completely avoid the secondary pollution caused by manually.