In this paper, we prove that some special classes of graphs like subdivision graph S(G), ),K ,(K (2) n1, (1) n1, Cmʘ , Kn generalized theta graph [ℓ[m]], Hanging generalized theta graph, Duplication of all the edges of Cn, Square graph of comb (Pn ʘ K1)2, 2 nn,B are admits square difference labeling (SDL).

Keywords : Square Difference Graph (SDG), Subdivision Graph, Crown Graph, Theta Graph, Comb Graph, AMS Subject Classification: 05C78.