  To naturally allow for string compactification with duality manifested, here
we investigate in the self-mirror large volume scenarios from Schoen Calabi-Yau
manifold. We explicitly study the geometry of Schoen Calabi-Yau threefold and
complete its triple intersection from both ambient and non-ambient spaces.
Based on these, we study the large volume scenario of self-mirror Calabi-Yau
compactification with Schoen type. Moreover, by studying the leading
non-perturbative terms of the effective scalar potential, we find special
uplift terms in order of F-term $\mathcal{O}(\frac{1}{\mathcal{V}^2})$ arising
from self-mirror large volume scenario. In particular, the quotient Schoen and
Schoen Calabi-Yau large volume scenarios both give rise to de Sitter vacua. In
addition, we discussed on the criteria to the effective scalar potential
derived from self-mirror large volume scenario according to the swampland
conjecture with the constraints fulfilled.
