引入宏包:\usepackage{titlesec}
\titleformat{章节命令}[形状]{格式}{标题序号}{序号与标题间距}{标题前命令}[标题后命令]
\titlespacing*{章节命令}{左边距}{上文距}{下文距}[右边距]
例如:
\titleformat{\chapter}[block]{\LARGE \bfseries}{Chapter \arabic{chapter}}{1em}{}[]
\titlespacing{\chapter}{0pt}{-2pt}{2pt}