Abstract: Taking geological conditions of 12305 working face in a mine of Shanxi province as background, and based on theoretical calculation of working resistance of filling body, the article designs support parameters, filling system and process of roadway, and puts forward paste-like mechanized filling gob-side entry retaining technology economically and reasonably. In order to save the cost, the production chooses the local sources of cement, fly ash, sand, gravel aggregate and compound admixture as filling material. The result of test in 12305 working face shows that the roadway surrounding rock deformation rate decreased obviously, and the deformation velocity is 1 to 2 mm/d in 200 meters behind the working face. The result proves that the filling gob-side entry retaining technology obtains good effect, which effectively alleviate the pressure to mine stope, ensures the safety in production.