The fact that certain non-linear W2,s algebras can be linearized by the inclusion of a spin-1 current can provide a simple way to realize W2,s algebras from linear W1,2,s algebras. In this paper, we first construct the explicit field realizations of linear W1,2,s algebras with double-scalar and doublespinor,respectively. Then, after a change of basis, the realizations of W2,s algebras are presented.The results show that all these realizations are Romans-type realizations.