Abstract: In order to solve the problem of serious floor heave of roadway near goaf side in high swelling and soft rock,the paper measured the deformation pattern and the structure of overlying strata by cross layout and borehole imaging methods,as a basis analysised the key factors of floor heave of roadway near goaf side in high swelling and soft rock.The results showed that rock stress and coal pillar strength were the key factors;the instability activation of overburden of roadway ner goaf side was the root of serious floor heave.Accordingly the paper proposed the new technologies to control the floor heave of roadway near goaf side in high swelling and soft rock:1）lateral roof cutting to optimized surrouding rock stress;2）packing to weak the rock activation degree;3）grouting reinforcement to improve the coal pillar strength.These ways provided a reference for the satety and high efficient mining of high expansion and soft rock.