The utility model provides a light rigidity shock attenuation composite sheet, including first metal sheet, second metal sheet and the spring steel steel band structure of buckling, the lower surfaceof first metal sheet and spring steel are buckled and are bondd through upper polymer damping binder layer between the last contact surface of steel band structure, the upper surface of second metal sheet and spring steel are buckled and are bondd through lower floor polymer damping binder layer between the lower contact surface of steel band structure, the spring steel is buckled the steel band structure and is pressed the nearly triangle -shaped hollow body that angle bent becomes the repeated emergence by spring steel strip. Beneficial effect: reduce the interior damping plate's of unit thickness density, rigidity is big, and the quality is light, improve damping plate's damping and denoising effect.