In this paper, the notion of covered left ideals of ordered semigroups will be introduced, and it is proved that the set of all covered left ideals of a given ordered semigroup is a sublattice of the lattice of all left ideals if the ordered semigroup. And then the structure of ordered semigroups containing covered left ideals will be studied. For the results of covered right ideals of ordered semigroups can be considered similarly.