Let R be a commutative ring and let Γ(Zn ) be the zero divisor graph of a commutative ring R, whose vertices are non-zero zero divisors of Zn, and such that the two vertices u, v are adjacent if n divides uv. In this paper, we introduce the concept of Decomposition of Zero Divisor Graph in a commutative ring and also discuss some special cases of Γ(Z22p), Γ(Z32p), Γ(Z52p), Γ(Z72p) and Γ(Zp2q). © 2020, Research Publication. All rights reserved.