Abstract: In order to master the time and space characteristics of backfill mining continuous curved beam in the process of formation,development and stablility,the time-dependent variable in the theoretical and engineering formula was researched deeply and the mathematical relationship between deformation of continuous curved beam and time was resulted .And then two-dimensional similar material test was conducted to simulate time and space evolution of strata movement under backilling mi ning condition,describing the displacement distribution characteristics of continuous curved beam as time goes by,based on which the time and space relationship amon g roof subsidence,sinking speed,backfilling body compression speed,working face advancing speed and dynamic deformation of continuous curved beam was made cle ar.Understanding the behavior of continuous curved beam within time and space can provide design basis for backilling mining process well.