For　the　parasitic　load　component　generated　by　multi-component　superposition　effect　has　a　great　influence　on　the　weight-sensing　output，　a　variable　parameter　and　multi-component　output　effect　assessment　method　based　on　the　overall　structure　was　proposed.　Subsequently，a　mathematical　theoretical　model　of　the　instantaneous　characteristics　of　＇strain-total　weight-motion＇　was　established　and　analyzed　by　finite　element　simulation.　In　addition，exploring　the　characteristics　of　the　multi-directional　motions　with　transverse，longitudinal　and　rotating　around　an　axis　that　are　commonly　seen　in　the　weighing　process，which　include　parasitic　effects　such　as　changing　the　total　weight，rotating　speed　and　angular　acceleration，etc.　Eventually，the　reasonableness　of　the　theoretical　model　and　simulation　analysis　was　verified　through　experimental　tests.　The　results　showed　that　the　parasitic　load　component　of　transverse　motion　had　the　smallest　influence　on　the　output，and　the　maximum　deviation　was　no　more　than　0.001%FS（　Full　Scale）；followed　by　longitudinal　motion，and　the　maximum　deviation　was　no　more　than　0.015%FS；and　the　parasitic　load　component　of　themotion　of　rotating　around　an　axis　had　the　largest　influence　on　the　output，and　the　maximum　deviation　can　be　up　to　0.5%FS，and　it　was　changed　with　the　differences　of　the　total　weight　and　the　rotating　speed，which　provided　a　technical　support　and　accuracy　compensation　technology　for　dynamic　weighing　application　of　the　weight-sensing　structure.　This　law　provides　the　technical　support　of　accuracy　compensation　and　scientific　evaluation　basis　for　the　dynamic　weighing　application　of　weight-sensing　structure.　©　2025　Editorial　Board　of　Jilin　University.　All　rights　reserved.