The invention discloses a method for improving bonding performance. The method comprises performing surface treatment on a material to be bonded by using primer; before the primer is completely solidified, processing the surface of the primer with an adhesive 1 to form an overlapping layer of the primer and the adhesive 1 between the primer and the adhesive 1. After the primer and the adhesive 1 are completely solidified, the adhesive 1 and the primer in the overlapping layer are fused and solidified together such that there is no clear interface between the adhesive 1 and the primer, which improves the adhesive force between the primer and the adhesive 1. The primer and the adhesive 1 have good bonding properties for the material to be bonded and another material to be bonded respectively, thereby improving the adhesion between the material to be bonded and the another material to be bonded. The method is also used for bonding a support material and CCM in a membrane electrode, thereby improving the bonding performance between the support material and the CCM.