  We show that supersymmetric(SUSY) W-algebra of generic level can be realized
as an intersection of the kernels of the screening operators. Applying this
result to principal SUSY W-algebras, we get their free field realization inside
the SUSY Heisenberg vertex algebras. Furthermore, the screening operators for
principal SUSY W-algebras allow us to present them as intersections of the
principal SUSY W-algebras associated with $\mathfrak{osp}(1|2)$,
$\mathfrak{osp}(2|2)$, $\mathfrak{osp}(3|2)$ and $\mathfrak{osp}(4|2)$,
tensored with SUSY Heisenberg vertex algebras.
