With　the　wide　application　of　photovoltaic　circuits,　the　optimal　power　control　function　of　photovoltaic　becomes　increasingly　prominent.　Boost　circuit　is　commonly　employed　in　photovoltaic　circuit　systems.　Owing　to　the　issue　of　large　input　current　ripple　in　Boost　circuit,　there　exists　a　greater　power　fluctuation　when　it　stabilizes　near　the　maximum　power　point.　The　interleaved　high-gain　Boost　circuit　is　extensively　utilized　in　practical　applications　due　to　its　large　voltage　amplification　factor　and　stable　input　current.　To　further　explore　the　application　of　high-gain　parallel　boost　circuit　in　maximum　power　point　tracking(MPPT),　an　MPPT　algorithm　combining　the　variable　conductance　increment　method　with　the　particle　swarm　optimization　(PSO)　algorithm　is　proposed,　and　the　advantages　of　the　staggered　high-gain　boost　circuit　in　MPPT　are　also　investigated.　The　simulation　framework　was　developed　and　implemented.　The　results　show　that,　compared　with　the　traditional　circuit　structure　and　algorithm,　the　PV　circuit　system　structure　and　MPPT　algorithm　proposed　in　this　thesis　have　a　faster　MPPT　speed　and　better　system　robustness.　©　2025　IEEE.