\documentclass{book}
\usepackage[extrafootnotefeatures]{xepersian}



\makeatletter
\def\@makeLTRfnmark{\hbox{\@textsuperscript{\latinfont\@thefnmark}}}
\renewcommand\@makefntext[1]{%
    \parindent 1em%
    \noindent
    \hb@xt@1.8em{\hss\if@RTL\@makefnmark\else\@makeLTRfnmark\fi}#1}
\makeatother


\paragraphfootnotes

\settextfont[Scale=1.3, ItalicFont=*, ItalicFeatures={FakeSlant=0.32}, BoldItalicFont=* Bold, BoldItalicFeatures={FakeSlant=0.32}]{B Zar}
\setlatintextfont[Scale=1.2]{Times New Roman}
\begin{document}

\LTRfootnote{salam1}
\LTRfootnote{salam1}
\LTRfootnote{salam1}
\LTRfootnote{salam1}


\end{document}