This problem has been solved, see http://forums.codeblocks.org/index.php/topic,20937.0.htmlHi guys,
I found let wxSmith output utf-8 format file, the wxSmith need to know in advance that the file is utf-8 format.
But, now all the files generated by the wizard do not contain Asian characters. 
So, the wxSmith can not determine the encoding of the file is ANSI, or UNICODE, or Windows-936, and it outputs a final ANSI format files, and abandoned Asian characters.
My solution before use wxSmith, first insert in a file which Asian characters. For example, by a "*"  using Asian character "★" to replace, then the wxSmith output the correct encoding of the file:
/***************************************************************
 ★ Name:      EasilyGCC_TemplateMain.cpp
 ★ Purpose:   Code for Application Frame
 ★ Author:    EasilyGCC
 ★ Created:   2016-01-26
 ★ Copyright: EasilyGCC
 ★ License:
 **************************************************************/
#include "wx_pch.h"
#include "EasilyGCC_TemplateMain.h"
#include <wx/msgdlg.h>
...