Abstract: To the problems of loading calculation formula absent and backfill body loading characteristics of gob-side entry retaining in shallow,the loading characteristic and evaluation of filling body were explored by theoretical analysis and field verify.The results showed that the deformation characteristics of concrete filling body appeared as controlling deformation character,it was small deformation of roadway and large loading of filling body.Based on coal pillar stability analysis method of long wall working face,and then the maximum loading evaluation formula of filling body was put forward,verified by field testing.It could reference for similar situation.