Abstract: With the research objective of taking different services of different demands dispatched to the optimal resources and be optimally treated,a strategy of classifying logic subnet was put forward.The definition of cloud droplet Web service nodewas put forward based on the harmonic oscillator theoretical method,andthe optimal route selection strategy was obtained and a realization framework applied in service scheduling was abstracted.Through experiments it is proven that the strategycan guarantee the scheduling scheme acquired to satisfy the restriction from service precedence relation,and the effectiveness of this method has fully demonstrated.