A　hydrogen　depressurization　system　is　required　to　supply　the　hydrogen　to　the　fuel　cell　stack　from　the　storage.　In　this　study,　a　Tesla-type　depressurization　construction　is　proposed.　Parallel　Tesla-type　channels　are　integrated　with　the　traditional　orifice　plate　structure.　A　computational　fluid　dynamics　(CFD)　model　is　applied　to　simulate　high-pressure　hydrogen　flow　through　the　proposed　structure,　using　a　commercial　software　package,　ANSYS-Fluent　(version　19.2,　ANSYS,　Inc.　Southpointe,　Canonsburg,　PA,　USA).　The　Peng-Robinson　(PR)　equation　of　state　(EoS)　is　incorporated　into　the　CFD　model　to　provide　an　accurate　thermophysical　property　estimation.　The　construction　is　optimized　by　the　parametric　analysis.　The　results　show　that　the　pressure　reduction　performance　is　improved　greatly　without　a　significant　increase　in　size.　The　flow　impeding　effect　of　the　Tesla-type　orifice　structure　is　primarily　responsible　for　the　pressure　reduction　improvement.　To　enhance　the　flow　impeding　effect,　modifications　are　introduced　to　the　Tesla-type　channel　and　the　pressure　reduction　performance　has　been　further　improved.　Compared　to　a　standard　orifice　plate,　the　Tesla-type　orifice　structure　can　improve　the　pressure　reduction　by　237%.　Under　low　inlet　mass　flow　rates,　introduction　of　a　secondary　Tesla-type　orifice　construction　can　achieve　better　performance　of　pressure　reduction.　Additionally,　increasing　parallel　Tesla-type　channels　can　effectively　reduce　the　maximum　Mach　number.　To　further　improve　the　pressure　reduction　performance,　a　second　set　of　Tesla-type　channels　can　be　introduced　to　form　a　two-stage　Tesla-type　orifice　structure.　The　study　provides　a　feasible　structure　design　to　achieve　high-efficiency　hydrogen　depressurization　in　hydrogen　fuel　cell　vehicles　(HFCVs).