Unmanned　Aerial　Vehicle　(UAV)　in　the　flight　process,　often　suffers　from　a　variety　of　external　disturbance,　after　the　disturbance　UAV　power　supply　needs　to　respond　quickly　and　stabilize　the　output.　To　address　this　problem,　this　paper　based　on　two-phase　interleaved　parallel　synchronous　Buck　converter　research　and　design　a　high　dynamic　nonlinear　control　strategy,　in　steady　state　use　Active　Disturbance　Rejection　Control　(ADRC)　to　estimate　the　system　disturbances　in　real　time　by　the　expanded　state　observer　to　reduce　the　disturbances　and　improve　the　system　robustness,　cut-load　dynamics　using　the　Optimized　Fastest　Current　Control　(OFCC),　which　results　in　a　significant　improvement　in　the　dynamic　response　of　the　system　with　the　fastest　regulation　speed　in　theory.　This　control　scheme　has　the　advantages　of　high　dynamics,　high　robustness,　and　so　on.　Finally,　the　simulation　was　carried　out　on　PSIM　to　verify　the　feasibility　and　advancement　of　the　control　scheme　proposed　in　this　paper　by　comparing　the　other　two　different　control　schemes.　©　Beijing　Paike　Culture　Commu.　Co.,　Ltd.　2025.