Push back shelf, also known as "press in shelf", uses the trolley to push the goods backward on the guide rail for storage. When storing the second goods, push the first goods into the depth direction. When picking up the goods, take out the shelf of the first goods location to slide forward the goods behind through the forward tilt angle of the guide rail, and adopt the access principle of "first in, then out". The storage space utilization rate of press in shelf is similar to drive in shelf, but forklift does not need to drive to the shelf area to pick up goods, which greatly improves the work efficiency. But the depth of storage location is relatively small.