Decorative sheet assembly for vehicle and assembling method thereof

The invention provides a decorative sheet assembly for a vehicle. The decorative sheet assembly comprises a first component with a first surface and a second surface and a second component, the first component comprises a first installation region, a first groove formed in the first surface along the edge of the first installation region and a plurality of first through holes formed in the first groove at intervals; the second component comprises a first body portion corresponding to the first installation region and a plurality of first foot portions stretching out from the first body portion, the multiple first foot portions correspond to multiple first through holes, and the multiple first foot portions penetrate through the multiple corresponding first through holes to the second surface of the first component to be connected with the second surface.