已经解决。
\documentclass[a6paper]{article}
\usepackage{axodraw4j}
\usepackage{pstricks}
\usepackage{color}
\setlength{\oddsidemargin}{0pt}
\setlength{\evensidemargin}{0pt}
\setlength{\topmargin}{0pt}
\setlength{\headheight}{0pt}
\setlength{\headsep}{0pt}
\setlength{\topskip}{0pt}
\setlength{\footskip}{0pt}
\setlength{\textwidth}{\paperwidth}
\addtolength{\textwidth}{-2in}
\setlength{\textheight}{\paperheight}
\addtolength{\textheight}{-2in}
\pagestyle{empty}
\begin{document}
%%JaxoComment:
%%JaxoScale{1.0}
\begin{center}
\fcolorbox{white}{white}{
\begin{picture}(469,237) (0,0)
\SetWidth{1.0}
\SetColor{Black}
\Line[arrow,arrowpos=0.5,arrowlength=0,arrowwidth=0,arrowinset=0](240,173)(128,13)
\Line[arrow,arrowpos=0.5,arrowlength=0,arrowwidth=0,arrowinset=0](128,13)(448,13)
\Line[arrow,arrowpos=0.5,arrowlength=0,arrowwidth=0,arrowinset=0](240,173)(448,13)
% Singular FArc, ignored!
\Text(240,157)[lb]{\Large{\Black{$\alpha$}}}
\Text(160,29)[lb]{\Large{\Black{$\gamma$}}}
\Text(408,24)[lb]{\Large{\Black{$\beta$}}}
\Text(145,109)[lb]{\LARGE{\Black{$\frac{V_{\mu d}V^{*}_{\mu b}}{V_{c d}V^{*}_{c b}}$}}}
\Text(352,112)[lb]{\LARGE{\Black{$\frac{V_{td}V^{*}_{tb}}{V_{cd}V^{*}_{cb}}$}}}
\Text(235,186)[lb]{\Large{\Black{$(\bar{\rho},\bar{\eta})$}}}
\Text(434,-4)[lb]{\Large{\Black{$(1,0)$}}}
\Text(122,-5)[lb]{\Large{\Black{$(0,0)$}}}
\Arc[arrow,arrowpos=0.5,arrowlength=5,arrowwidth=2,arrowinset=0.2](244.337,168.173)(27.274,-138.215,-33.803)
\Arc[arrow,arrowpos=0.5,arrowlength=5,arrowwidth=2,arrowinset=0.2,clock](153.053,27.16)(22.86,87.626,-38.273)
\Arc[arrow,arrowpos=0.5,arrowlength=5,arrowwidth=2,arrowinset=0.2](420.356,27.517)(23.403,127.837,218.34)
\end{picture}
}
\end{center}
\end{document}