Let Ck be a cycle with k edges. Let G be a graph. If there is no k-cycle contained in G and connecting any non-adjacent vertices of G will obtain a k-cycle, then we call G is a Ck saturated graph. In this thesis, we give four constructions to construct a Ck saturated graph with n vertices. Respectively, we use the complete graph Kk-1, complete graphs Kk/2+1and K(k+1)/2, a (k+1)-cycle Ck+1 and a complete graph Kk-4, and a Wheel graph W(n, k) to construct a Ck saturated graph with n vertices. After that we enumerate the edges in each Ck saturated graph with n vertices and compare the numbers of edges of these four Ck saturated graphs with n vertices.