  In this paper, we investigate the weak cosmic censorship conjecture for the
Kerr-Sen black holes by considering the new version of the gedanken experiments
proposed recently by Sorce and Wald. After deriving the first two order
perturbation inequalities in the low energy limit of heterotic string theory
based on the Iyer-Wald formalism and applying it into the Kerr-Sen black hole,
we find that the Kerr-Sen black hole can not be overspun or overcharged by the
charged matter collision after taking into account the second-order
perturbation inequality, although they can be destroyed by the scene only
considering the first-order perturbation inequality. Therefore, the weak cosmic
censorship conjecture is preserved in the Kerr-Sen black hole at this level.
