By employing Krasnoselskii's fixed pomt theorem,the existence of nonoscillatory solutions of the second-order nonlinear neutral dynamic equations on time scales[r(t)(x(t)+p(t)x(t-τ))Δ]Δ+∑mi=1Qi(t)fi(x(t-σi))=0,t∈Tis established.The obtained results cover those for second-order nonlinear neutral differential equations and provide new crtteria for second-order nonlinear neutral differential equations.