<p style='text-indent:20px;'>The aim of this paper is to prove existence and regularity of solutions for the following nonlinear singular parabolic problem</p><p style='text-indent:20px;'><disp-formula> <label/> <tex-math id="FE1"> \begin{document}$ \left\{ \begin{array}{lll} \dfrac{\partial u}{\partial t}-\mbox{div}\left( \dfrac{a(x,t,u,\nabla u)}{(1+|u|)^{\theta(p-1)}}\right) +g(x,t,u) = \dfrac{f}{u^{\gamma}} &amp;\mbox{in}&amp;\,\, Q,\\ u(x,0) = 0 &amp;\mbox{on} &amp; \Omega,\\ u = 0 &amp;\mbox{on} &amp;\,\, \Gamma. \end{array} \right. $\end{document} </tex-math></disp-formula></p><p style='text-indent:20px;'>Here <inline-formula><tex-math id="M1">\begin{document}$ \Omega $\end{document}</tex-math></inline-formula> is a bounded open subset of <inline-formula><tex-math id="M2">\begin{document}$ I\!\!R^{N} (N&gt;p\geq 2), T&gt;0 $\end{document}</tex-math></inline-formula> and <inline-formula><tex-math id="M3">\begin{document}$ f $\end{document}</tex-math></inline-formula> is a non-negative function that belong to some Lebesgue space, <inline-formula><tex-math id="M4">\begin{document}$ f\in L^{m}(Q) $\end{document}</tex-math></inline-formula>, <inline-formula><tex-math id="M5">\begin{document}$ Q = \Omega \times(0,T) $\end{document}</tex-math></inline-formula>, <inline-formula><tex-math id="M6">\begin{document}$ \Gamma = \partial\Omega\times(0,T) $\end{document}</tex-math></inline-formula>, <inline-formula><tex-math id="M7">\begin{document}$ g(x,t,u) = |u|^{s-1}u $\end{document}</tex-math></inline-formula>, <inline-formula><tex-math id="M8">\begin{document}$ s\geq 1, $\end{document}</tex-math></inline-formula> <inline-formula><tex-math id="M9">\begin{document}$ 0\leq\theta&lt; 1 $\end{document}</tex-math></inline-formula> and <inline-formula><tex-math id="M10">\begin{document}$ 0&lt;\gamma&lt;1. $\end{document}</tex-math></inline-formula></p>