I solve my problem by put `\renewcommand\chaptername{Appendix}`
after `\appendix` like this
```
\appendix
\renewcommand\chaptername{Appendix}
```
Fule code
```
\documentclass[12pt,a4paper,twoside,openany]{book}
\usepackage[left=2cm,right=1.5 cm,top=2cm,bottom=2cm]{geometry}
\usepackage{lipsum}
\usepackage{tocloft}
\usepackage{etoolbox}
\usepackage[titletoc,toc,title]{appendix}
\usepackage{fancyhdr}
\renewcommand{\chaptermark}[1]{\markboth{#1}{}}
\renewcommand{\sectionmark}[1]{\markright{#1}}
\pagestyle{fancy}
\fancyhf{}
\fancyhead[LE,RO]{\thepage}
\fancyhead[LO]{\itshape\nouppercase{\rightmark}}
\fancyhead[RE]{\itshape\nouppercase{\leftmark}}

\renewcommand{\chaptermark}[1]%
{\markboth{{\it \chaptername\,\thechapter.\  #1}}{}}

\renewcommand{\sectionmark}[1]%
{\markright{\it \thesection.\ #1}}
\lhead[\fancyplain{}{\thepage}]%
{\fancyplain{}{\rightmark}}
\rhead[\fancyplain{}{\leftmark}]%
{\fancyplain{}{\thepage}}
\cfoot{}
\sloppy

\apptocmd{\appendix}
{\addtocontents{toc}{%  
		\protect\addtolength\protect\cftchapnumwidth{-\mylength}%
		\protect\renewcommand{\protect\cftchappresnum}{Appendix~}%
		\protect\settowidth\mylength{\bfseries\protect\cftchappresnum\protect\cftchapaftersnum}%
		\protect\addtolength\protect\cftchapnumwidth{\mylength}}%
}{}{}

\newlength\mylength
\renewcommand{\cftchapaftersnum}{.}

\renewcommand\cftchappresnum{Chapter~} 
\settowidth\mylength{\bfseries\cftchappresnum\cftchapaftersnum}
\addtolength\cftchapnumwidth{\mylength}

\usepackage{hyperref}
\hypersetup{
	colorlinks=true,
	linkcolor=blue,
	,unicode,bookmarksnumbered
}
\begin{document}
	\chapter{Chapter one}
	\lipsum[1-5]
	\chapter{Chapter two}
	\lipsum[5-10]
	\appendix
	\renewcommand\chaptername{Appendix}
	\chapter{Appendix}
	
	\section{One section}
	\lipsum[11-30]
\end{document}
```
![ScreenHunter 1154.png](/image?hash=2510bd0eb1d31594fb04ad13d4e2976199c784c540dffa333b02f8b24915f0c5)