An　efficient　and　accurate　equivalent　design　method　for　hybrid　lattice　structures　is　proposed.　First,　the　equivalent　mechanical　properties　of　the　lattice　structures　are　calculated,　including　the　equivalent　elastic　modulus,　shear　modulus,　and　Poisson＇s　ratio.　We　construct　an　effective　and　simple　stretching-bending　hybrid　lattice　structure,　which　uses　two　types　of　lattice　structures:　stretching-dominated　lattice　structure　and　bending-dominated　lattice　structure.　The　optimal　material　density　distributions　are　obtained　via　topological　optimization　by　taking　three-point　bending　beams　and　L-shaped　beams　as　examples.　The　optimized　stretching-bending　hybrid　lattice　structures　are　designed　based　on　the　equivalent　properties　of　the　lattice　structures.　The　same　relative　density　uniform　lattice　structure　is　constructed　while　being　compared　with　the　stretching-bending　hybrid　lattice　structure.　The　corresponding　equivalent　homogenization　model　and　accurate　beam　model　are　established　for　comparison　and　verification　by　finite　element　analysis.　Results　show　that　the　hybrid　lattice　structure　has　higher　stiffness　than　the　uniform　lattice　structure　with　the　same　relative　density.　The　equivalent　homogenized　model　of　a　hybrid　lattice　structure　can　effectively　characterize　the　mechanical　properties　of　the　structure　and　improve　design　efficiency.