\begin{table}[!t]
\begin{minipage}[!t]{\columnwidth}\renewcommand{\arraystretch}{1.3}\caption{表格1标题}\label{表格1标签}\centering\setlength{\tabcolsep}{0.6mm}{\begin{tabular}{ccccccccccc}表格1内容\end{tabular}}\end{minipage}
\\[12pt]%设置两个表格之间的空白行距离
\begin{minipage}[!t]{\columnwidth}\renewcommand{\arraystretch}{1.3}\caption{表格2标题}\label{表格2标签}\centering\setlength{\tabcolsep}{0.8mm}{\begin{tabular}{ccccccccccccccccc}表格2内容\end{tabular}}\end{minipage}\vspace{-0.1cm}%设置第二个表格与正文下文的空白行距离
\end{table}