Through　introducing　controlled　alternate　quantum　walks,　we　present　controlled　alternate　quantum　walks　(CAQW)　based　quantum　hash　function.　CAQW　based　quantum　hash　function　have　excellent　security,　outstanding　statistical　performance　and　splendid　expansibility.　Furthermore,　due　to　the　structure　of　alternate　quantum　walks,　implementing　CAQW　based　quantum　hash　function　significantly　reduces　the　resources　necessary　for　its　feasible　experimental　realization　than　implementing　other　quantum　hash　functions.