In this paper. we study the Schur complement problem of $ S $-SOB matrices. and prove that the Schur complement of $ S $-Sparse Ostrowski-Brauer ($ S $-SOB) matrices is still in the same class under certain conditions. Based on the Schur complement of $ S $-SOB matrices. https://thegreensjunglebeautyshops.shop/product-category/face-palette/