\documentclass[a4paper,11pt,oneside,fleqn]
\usepackage{ngerman}
\usepackage[square,numbers]{natbib}
\usepackage[latin1]{inputenc}
\usepackage{amsmath}
\usepackage{MnSymbol}
\usepackage{placeins}
\usepackage{setspace}
\usepackage{longtable}
\bibliographystyle{dinat}
\usepackage{subfigure}
\usepackage{graphicx}
\usepackage{booktabs}
\usepackage{enumitem}
\usepackage{tabulary}
\setcounter{tocdepth}{5}
begin{document}
\begin{figure}
\subfigure[A ]{\includegraphics[width=0.5\columnwidth,height=0.35\textheight]{Abbildungen/A.pdf}}
\label{subfig-a:A}
\subfigure[B]{\includegraphics[width=0.5\columnwidth,height=0.35\textheight]{Abbildungen/B.pdf}}
\label{subfig-b:B}
\caption{AB}
\label{fig:AB}
\end{figure}
\end{document}
Danke!

