Aiming　at　the　problem　of　wasting　plastic　film　when　packaging　with　existing　packaging　machines　on　the　market,　the　structure　optimization　design　of　the　multi-milk　bag　packaging　technology　system　is　carried　out　by　using　the　invention　principle,　and　the　experiment　is　verified.　According　to　the　problem　of　wasting　plastic　film　when　packaging　the　heat　sealing　machine　to　determine　the　technical　system　and　establish　the　functional　model　of　the　system　component.First,　applying　the　contradiction　analysis,　object-field　analysis　and　other　methods　to　systematically　analyze　the　problems　existing　in　the　technical　system.　Then,　using　the　invention　principle　to　generate　a　series　of　innovative　design　solutions.　Finally,　selecting　the　optimal　solution　and　design　the　prototype　based　on　considering　the　production　cost,　economic　benefit,　manufacturing　difficulty　and　other　factors.　The　experimental　results　show　that　the　improved　packaging　machine　packaging　effect　is　better　and　saving　the　material.