The push-back rack works by chart, the pallet on the cart can be pushed sliding on the guide rails, the 2^ndpallet can push the 1^st pallet in the depth of the guide rail in storing, and taking the 1^st pallet out, the 2^nd pallet will slide forward to the 1^st pallet positions by gravity. It is with “First In, Last Out” principle. The storage capacity of push-back rack is similar with drive-in rack, but the forklift no need to go inside the racking, it offers higher working efficiency, but the depth of storage is relatively less.