\documentclass{ctexrep}
......
\usepackage{fancyhdr}% 用于页眉页脚设置
\pagestyle{fancy}
\fancyhf{}%清空页眉页脚
\fancyhead[CO]{\zihao{-5 } \leftmark}
\fancyhead[CE]{\zihao{-5 } 中山大学硕士学位论文}
\fancyfoot[c]{\zihao{-5 } \thepage}
.......
\begin{document}
\maketitle
\pagenumbering{Roman}
\begin{abstract}
......
\end{abstract}
\tableofcontents
\pagenumbering{arabic}
\chapter{......}
......
\end{document}