diff --git a/autoload/SpaceVim/api/data/string.vim b/autoload/SpaceVim/api/data/string.vim
index 9ce026976..6ac7c3c55 100644
--- a/autoload/SpaceVim/api/data/string.vim
+++ b/autoload/SpaceVim/api/data/string.vim
@@ -49,6 +49,20 @@ function! s:self.fill(str, length, ...) abort
   return l:string . l:spaces
 endfunction
 
+function! s:self.toggle_case(str) abort
+  let chars = []
+  for char in self.string2chars(a:str)
+    if char2nr(char) >= 97 && char2nr(char) <= 122
+      call add(chars, nr2char(char2nr(char) - 32))
+    elseif char2nr(char) >= 65 && char2nr(char) <= 90
+      call add(chars, nr2char(char2nr(char) + 32))
+    else
+      call add(chars, char)
+    endif
+  endfor
+  return join(chars, '')
+endfunction
+
 function! s:self.fill_left(str, length, ...) abort
   if strwidth(a:str) <= a:length
     let l:string = a:str
diff --git a/autoload/SpaceVim/plugins/iedit.vim b/autoload/SpaceVim/plugins/iedit.vim
index ca1c04050..e14456969 100644
--- a/autoload/SpaceVim/plugins/iedit.vim
+++ b/autoload/SpaceVim/plugins/iedit.vim
@@ -221,6 +221,11 @@ function! s:handle_normal(char) abort
       let s:cursor_stack[i].end = ''
     endfor
     call s:replace_symbol()
+  elseif a:char == 126 " ~
+    for i in range(len(s:cursor_stack))
+      let s:cursor_stack[i].cursor = s:STRING.toggle_case(s:cursor_stack[i].cursor)
+    endfor
+    call s:replace_symbol()
   elseif a:char == 115 " s
     let s:mode = 'i'
     let w:spacevim_iedit_mode = s:mode
diff --git a/test/api/data/string.vader b/test/api/data/string.vader
index 117edb407..d691f64af 100644
--- a/test/api/data/string.vader
+++ b/test/api/data/string.vader
@@ -40,4 +40,6 @@ Execute ( SpaceVim api: data#string ):
   AssertEqual str.strAllIndex('hello spacevim hello', 'he.*', 1), [[0, 20]]
   AssertEqual str.strAllIndex('hello spacevim hello', 'he[^ ]*', 1), [[0, 5], [15, 20]]
   AssertEqual str.strAllIndex('let s:cursor_stack[i].end = s:cursor_stack[i].cursor . s:cursor_stack[i].end', 's.cursor[^_]*', 1), [[4, 12], [28, 36], [55, 63]]
+  Log 'test toggle_case()'
+  AssertEqual str.toggle_case(' A b 123'), ' a B 123'
   unlet str