The utility model provides a fixing assembly which uses to having fenestrate electronic component. Perforate and communicate electronic component's first surface and second surface. The first surface is located electronic component's first side. The second surface is located electronic component's second side. Fixing assembly contains first fin, double -screw bolt and screw. First fin sets up in electronic component's first side. The double -screw bolt sets up on first fin to the configuration is in order to penetrate the perforation by the first surface. The screw configuration is in order to penetrate the perforation by the second surface to lock solid to double -screw bolt.