  We study N=1 superconformal theory in the context of AdS/CFT correspondence
in the large central charge limit using Chern-Simons formulation of $3d$
gravity. In this limit conformal dimensions of a subclass of so-called light
primary superfields remain finite and are governed by $\mathfrak{osp}(1|2)$
subalgebra of N=1 super-Virasoro algebra. We describe the construction of
$\mathfrak{osp}(1|2)$ conformal blocks in terms of Wilson lines of the
Chern-Simons $3d$ gravity. We consider examples of two and three-point blocks
on the sphere and one-point torus blocks of light superprimary fields, which
belong to finite-dimensional representations of $\mathfrak{osp}(1|2)$. We study
the correlation function for lower and upper components of the primary
$\mathfrak{osp}(1|2)$ doublets and show that the associated conformal blocks
are obtained via Wilson line construction in Chern-Simons theory.
