This　article　investigates　the　predefined-time　tracking　problem　for　high-order　strict　feedback　system.　Modified　command　filter　can　not　only　avoid　the　＇computational　complexity　explosion＇　phenomenon　in　traditional　backstepping　methods,　but　also　alleviate　the　chattering　problem　caused　by　signum　in　conventional　filters.　A　novel　predefined-time　compensation　system　is　proposed　to　compensate　for　the　decrease　in　control　accuracy　caused　by　filtering　errors.　Predefined-time　command　filtering　controller　is　proposed　by　combining　the　backstepping　mechanism　and　predefined-time　theory,　ensuring　that　the　controlled　system　converges　within　a　user-defined　time.　Finally,　mathematical　simulation　demonstrates　the　rationality　and　effectiveness　of　the　proposed　control　scheme.　©　2024　Technical　Committee　on　Control　Theory,　Chinese　Association　of　Automation.