Based on the analysis of cocuring principle of honeycomb sandwich structure and mechanical properties of honeycomb at 180 ℃, a force model for honeycomb slide is established,and four key factors affecting honeycomb slide are determined, namely the lateral compressive capacity of honeycomb, inter-layer friction coefficient, angle of core chamfer, and cocuring pressure difference.Further analysis of these key factors reveals the sub factors that affect the four key factors and represent their respective roles. At the same time,the effective measures to restrain the slide of honeycomb are put forward as follows: 1）the layer closest to the honeycomb core （0/90° fabric is better） is recommended to extended to the edge of the part so as to use grit strip, fiberglass tiedown, etc.; 2） improving the lateral stiffness of honeycomb by the core stabilization methods such as impregnation method, adhesive film method, and septum method.