Abstract: Aiming at the chain relationship between the load of the virtual machine and the physical machine,the paper builds a load balancing framework based on the double-layer controlling,and the model of load degree and relatively load balancing degree.The paper also introduces the computing method of integrated weight and migration probability.With this,the task scheluding and live migration algrithom effect on the load balancing.The result shows that this method implementes the load balancing while improving the resource utilization.