A　feasible　and　general　strategy　based　multimetallic　metal-organic　frameworks　template　is　developed　to　fabricate　hierarchical　structured　multimetallic　selenide.　The　obtained　series　of　transition　metal　doped　iron　selenide　exhibit　high　performance　for　oxygen　evolution　reaction　(OER).　Especially,　the　Cu-doped　FeSe2　electrocatalyst　shows　the　lowest　overpotential　of　193　mV　at　a　current　density　of　10　mA　cm(-2)　which　outperforms　previously　reported　selenide-based　electrocatalysts.　The　experimental　results　and　theoretical　simulations　demonstrate　that　the　doping　of　substitutional　Cu　in　the　host　lattice　of　FeSe2　optimizes　the　electronic　structure,　being　favorable　for　accelerating　the　electron　transfer　and　boosting　reaction　kinetic.　Meanwhile,　the　special　structure　design　enables　the　electrocatalyst　with　hierarchical　structures,　affording　rich　exposed　active　sites　for　efficient　OER.　Therefore,　this　work　provides　a　feasible　strategy　for　fabricating　hierarchical　structured　metal　selenides　for　potential　electrochemical　energy　storage　and　conversion.　(C)　2019　Author(s).