The platform and pallet storage security system is a device or apparatus in the form of a lockable security box with attached cables, cords, chains, and/or straps for securing to prevent theft from stacks or piles of materials or products stored, stowed, or placed on devices such as platforms, pallets, and crates in the material transport and stowage arts. The device or apparatus is made of tamper resistant metal and designed to fit the edges or sides of palletized materials which are connected to and secured to each other around and across the surface of said palletized materials so as to enable the securing of said palletized materials thereby preventing or resisting the theft of the secured materials.