In order to prevent failure condition from spreading, and avoid the phenomenon of network collapse effectively under the influence of propagation effect of node failure, this paper proposes a model of modified betweenness, defines initial load by controllable coefficient α, and then describes a relatively good point α=0.6 by using the theory of degree and betweenness. Through modeling on scalefree network, the paper can draw a simulation conclusion by comparing the nodes under the conditions ofα＜0.6with α＞0.6 subjected to attack. The simulation result shows that the node whose initial load point is low is subjected to attack, and its survivability of corresponding network is stronger than that of the node whose initial load is high under the conditions of α＜0.6. The result is opposite under the conditions of α＞0.6. But at the conditions of α=0.6, the survivability is comparatively good whatever what kind of node is subjected to attack. The result shows that the viability and the survivability can increase and improve furthest by controlling the coefficient of α＞0.6 neighborly in real network planning.