Accurate simulation of the delamination growth behavior in composite multidirectional laminates is important for the designs of composite structures. According to the failure mechanism of multidirectional laminates, a novel three-linear cohesive zone model has been established in our previous work, in order to include the influence of fiber bridging on the delamination growth behavior in simulation. Based on that, numerical researches on the critical parameters in the novel three-linear cohesive zone model are performed in this study using two-dimensional finite element method. A value scheme of the critical parameters suitable for the simulation on the delamination growth in composite multidirectional laminates is obtained. The simulated results using the value scheme have good agreements with the experimental results, validating its effectiveness in the novel three-linear cohesive zone model.