Aiming　at　the　problems　of　steady-state　error　and　low　operating　efficiency　caused　by　parameter　disturbance　in　deadbeat　current　predictive　control　system　of　PMSM,　an　improved　deadbeat　current　predictive　control　with　active　disturbance　rejection　is　proposed.　Through　analyzing　the　principle　of　current　static　error　in　two-step　deadbeat　current　predictive　control　with　time-varying　parameters,　a　second-order　variable-speed　sliding　mode　disturbance　observer　is　proposed,　which　can　completely　eliminate　the　current　steady-state　error　and　improve　the　dynamic　tracking　performance　of　the　system.　The　sliding　surface　of　the　observer　adopts　the　second-order　variable-speed　reaching　law　and　effectively　suppresses　the　chattering　of　the　system.　Simulation　comparisons　were　carried　out　for　the　traditional　deadbeat　current　predictive　control,　predictive　model　with　first-order　linear　extended　observer　and　predictive　control　with　second-order　variable-speed　sliding　mode　disturbance　observer.　The　effectiveness　of　proposed　scheme　in　eliminating　steady-state　error,　reducing　current　distortion　rate　and　torque　ripple　is　verified.　The　robustness　and　efficiency　of　the　system　have　also　been　improved.　©　2021　ACM.