The car trunk organizer, featuring a foldable design, reshapes the in car storage experience. When unfolded, its regular rectangular cube structure rationally divides into multiple storage spaces, making full use of the trunk space. When folded, its thickness is greatly reduced, allowing it to be easily stuffed into the gaps of the trunk or the corners of the garage without occupying extra space. The outer shell is made of durable fabric, which is wear resistant, waterproof and tear-resistant. Scratches from tools in the car trunk and water stains in rainy days won't damage the organizer. The internal support structure is stable, not easy to deform when unfolded, and can maintain its shape even when fully loaded with heavy items, remaining "sturdy" after long-term use.