  In this paper, we present two non-perturbative string cosmological solutions
without curvature singularities for the bosonic gravi-dilaton system. These
solutions are general in the sense that they can straightforwardly match the
perturbative solution to arbitrarily high orders in the perturbative region.
The first solution includes non-perturbative $\alpha'$ corrections based on
Hohm-Zwiebach action. We then use the simple phenomenological map between
$\alpha^{\prime}$ corrected theory and loop corrected theory in string
cosmology to construct a non-perturbative loop corrected non-singular solution.
Both solutions are non-singular everywhere. Therefore, the pre- and
post-big-bangs are smoothly connected by these solutions.
