Abstract: Gob-side entry retaining is the main form of domestic roadway protection without coal pillar, we carry out exploration and practice from filling material and parameter selection, equipment layout and filling area roof support and technological process for deep well gob-side entry retaining filling technology, optimize roadside packing filling process, and analyze the deformation and stress distribution of roadside packing filling gob-side entry retaining and the filling body. Practice shows that the deep well gob-side entry retaining filling technology can ensure the integrity and stability of the roof supporting structure, and the filling body is able to control roof subsidence and adapt for roof vigorous activity requirements.